Fix race condition in TestSocketCleanup by protecting listener access with mutex

Fixes bd-160

The race was between Start() writing s.listener and Stop() reading it.
Now all listener access is protected by the server mutex:
- Start() stores listener under lock after creation
- Accept loop reads listener under RLock
- Stop() closes listener under lock

All RPC tests now pass with -race flag.

.beads/issues.jsonl

@@ -63,9 +63,10 @@
 {"id":"bd-155","title":"Daemon production readiness","description":"Make beads daemon production-ready for long-running use, multi-repo deployments, and resilient operation.\n\nCurrent state: Good foundation, works well for development\nTarget state: Production-ready for individual developers and small teams\n\nGap areas:\n1. Resource management (cache eviction, limits)\n2. Health monitoring and crash recovery\n3. Process lifecycle management\n4. User experience (visibility, feedback)\n5. Operational concerns (logging, metrics)\n\nSuccess criteria:\n- Can run for weeks without restart\n- Handles 50+ repositories efficiently\n- Recovers from crashes automatically\n- Users understand daemon status\n- Observable and debuggable","acceptance_criteria":"All child issues completed:\n- P0 issues: Storage cache, health checks, crash recovery, MCP cleanup\n- P1 issues: Global auto-start, visibility, version checks\n- P2 issues: Resource limits, telemetry, log rotation\n\nValidation:\n- Run daemon for 7+ days without issues\n- Test with 50+ repositories\n- Verify crash recovery\n- Confirm resource usage is bounded\n- Check metrics and logs are useful","status":"in_progress","priority":0,"issue_type":"epic","created_at":"2025-10-18T13:07:43.543715-07:00","updated_at":"2025-10-18T18:35:11.752924-07:00"}
 {"id":"bd-156","title":"Refactor import logic to eliminate duplication between manual and auto-import","description":"The import logic is duplicated in two places:\n1. cmd/bd/import.go (manual 'bd import' command)\n2. cmd/bd/main.go:autoImportIfNewer() (auto-import after git pull)\n\nBoth have nearly identical code for:\n- Reading and parsing JSONL\n- Type-asserting store to *sqlite.SQLiteStorage (where we just fixed a bug twice)\n- Opening direct SQLite connection when using daemon mode\n- Detecting collisions with sqlite.DetectCollisions()\n- Scoring and remapping collisions\n- Importing issues, dependencies, and labels\n\n**Problems:**\n- Bugs must be fixed in two places (we just did this for daemon mode)\n- Features must be implemented twice\n- Tests must cover both code paths\n- Harder to maintain and keep in sync\n- Higher risk of divergence over time\n\n**Proposed solution:**\nExtract a shared function that handles the core import logic:\n\n```go\n// importIssues handles the core import logic used by both manual and auto-import\nfunc importIssues(ctx context.Context, dbPath string, store storage.Storage, \n                  issues []*types.Issue, opts ImportOptions) (*ImportResult, error) {\n    // Handle SQLite store detection/creation for daemon mode\n    // Detect collisions\n    // Score and remap if needed\n    // Import issues, dependencies, labels\n    // Return result\n}\n```\n\nBoth import.go and autoImportIfNewer() would call this shared function with their specific options.\n\n**Benefits:**\n- Single source of truth for import logic\n- Bugs fixed once\n- Easier to test\n- Easier to extend with new import features\n- Less code overall","status":"closed","priority":2,"issue_type":"chore","created_at":"2025-10-18T17:07:06.007026-07:00","updated_at":"2025-10-18T18:35:11.753484-07:00","closed_at":"2025-10-18T17:11:20.280214-07:00"}
 {"id":"bd-157","title":"Complete auto-import refactoring to use shared importIssuesCore function","description":"The manual import command (bd import) was successfully refactored to use the shared importIssuesCore() function in import_shared.go, reducing code from 494 lines to 170 lines.\n\nHowever, autoImportIfNewer() in cmd/bd/main.go still has ~298 lines of duplicated import logic that should use the same shared function.\n\n**Current state:**\n- ✅ Manual import uses importIssuesCore() (commit 790233f)\n- ❌ Auto-import still has duplicated logic (lines 618-915 in main.go)\n\n**Duplication includes:**\n- SQLite store detection/creation for daemon mode (fixed in 790233f)\n- Collision detection with sqlite.DetectCollisions()\n- Scoring and remapping collisions\n- Importing issues (update existing, create new)\n- Importing dependencies\n- Importing labels\n\n**Benefits of completing this:**\n- Remove ~200 more lines of duplicated code\n- Ensure manual and auto-import have identical behavior\n- Future bug fixes only need to be made once\n- Easier to test and maintain\n\n**Implementation:**\nReplace lines 714-908 in autoImportIfNewer() with:\n```go\nopts := ImportOptions{\n    ResolveCollisions: true,  // Auto-import always resolves\n    DryRun:            false,\n    SkipUpdate:        false,\n    Strict:            false,\n}\nresult, err := importIssuesCore(ctx, dbPath, store, allIssues, opts)\n// Handle result and show remapping notification\n```\n\nThen update hash storage logic at the end.","status":"closed","priority":2,"issue_type":"chore","created_at":"2025-10-18T17:38:34.443872-07:00","updated_at":"2025-10-18T18:35:11.754006-07:00","closed_at":"2025-10-18T18:07:05.553928-07:00"}
-{"id":"bd-158","title":"Add .gitignore to prevent noisy untracked beads files","description":"When using beads, git status shows several untracked files in .beads/ directory: .beads/.gitignore, .beads/db.sqlite, daemon.pid and daemon.lock files. These should be added to the project's .gitignore to prevent noise.","status":"open","priority":2,"issue_type":"chore","created_at":"2025-10-18T18:27:16.424878-07:00","updated_at":"2025-10-18T18:35:11.754574-07:00"}
+{"id":"bd-158","title":"Add .gitignore to prevent noisy untracked beads files","description":"When using beads, git status shows several untracked files in .beads/ directory: .beads/.gitignore, .beads/db.sqlite, daemon.pid and daemon.lock files. These should be added to the project's .gitignore to prevent noise.","status":"closed","priority":2,"issue_type":"chore","created_at":"2025-10-18T18:27:16.424878-07:00","updated_at":"2025-10-19T09:05:48.4899-07:00","closed_at":"2025-10-19T09:05:48.4899-07:00"}
 {"id":"bd-159","title":"Implement --max-depth flag for bd dep tree","description":"PR #87 adds the flag but doesn't wire it through. Need to:\n1. Add flag definition in cmd/bd/dep.go\n2. Pass maxDepth to store.GetDependencyTree()\n3. Fix truncation warning to show actual depth used\n4. Add tests for truncation behavior (TestGetDependencyTree_TruncationDepth, TestGetDependencyTree_DefaultDepth)\n5. Update CLI docs/help\n\nDefault should remain 50. Keep using direct storage mode (no RPC needed for now).\n\nRelated: PR #87, bd-3","status":"closed","priority":2,"issue_type":"feature","created_at":"2025-10-19T08:31:15.473267-07:00","updated_at":"2025-10-19T08:55:21.266386-07:00","closed_at":"2025-10-19T08:55:21.266386-07:00"}
 {"id":"bd-16","title":"Add EXPLAIN QUERY PLAN tests for ready work query","description":"Verify that the hierarchical blocking query uses proper indexes and doesn't do full table scans.\n\n**Queries to analyze:**\n1. The recursive CTE (both base case and recursive case)\n2. The final SELECT with NOT EXISTS\n3. Impact of various filters (status, priority, assignee)\n\n**Implementation:**\nAdd test function that:\n- Runs EXPLAIN QUERY PLAN on GetReadyWork query\n- Parses output to verify no SCAN TABLE operations\n- Documents expected query plan in comments\n- Fails if query plan degrades\n\n**Benefits:**\n- Catch performance regressions in tests\n- Document expected query behavior\n- Ensure indexes are being used\n\nRelated to: bd-77 (composite index on depends_on_id, type)","status":"closed","priority":3,"issue_type":"task","created_at":"2025-10-16T20:46:08.971822-07:00","updated_at":"2025-10-18T18:35:11.755001-07:00","closed_at":"2025-10-18T12:47:44.284846-07:00"}
+{"id":"bd-160","title":"Fix race condition in TestSocketCleanup","description":"Race condition detected in internal/rpc/rpc_test.go:195 in TestSocketCleanup. This is causing CI test failures.\n\nThe race appears to be between goroutines accessing shared state during server startup/shutdown in the socket cleanup test.\n\nLocation: internal/rpc/rpc_test.go:195\nTest output shows DATA RACE between goroutines 83 and 85.","status":"in_progress","priority":1,"issue_type":"bug","created_at":"2025-10-19T09:11:34.766584-07:00","updated_at":"2025-10-19T09:13:05.448924-07:00"}
 {"id":"bd-17","title":"Make auto-flush debounce duration configurable","description":"flushDebounce is hardcoded to 5 seconds. Make it configurable via environment variable BEADS_FLUSH_DEBOUNCE (e.g., '500ms', '10s'). Current 5-second value is reasonable for interactive use, but CI/automated scenarios might want faster flush. Add getDebounceDuration() helper function. Located in cmd/bd/main.go:31.","status":"closed","priority":3,"issue_type":"feature","created_at":"2025-10-16T20:46:08.971822-07:00","updated_at":"2025-10-18T18:35:11.755588-07:00","closed_at":"2025-10-18T09:47:43.22126-07:00"}
 {"id":"bd-18","title":"Optimize auto-flush to use incremental updates","description":"Every flush exports ALL issues and ALL dependencies, even if only one issue changed. For large projects (1000+ issues), this could be expensive. Current approach guarantees consistency, which is fine for MVP, but future optimization could track which issues changed and use incremental updates. Located in cmd/bd/main.go:255-276.","status":"closed","priority":3,"issue_type":"feature","created_at":"2025-10-16T20:46:08.971822-07:00","updated_at":"2025-10-18T18:35:11.755965-07:00","closed_at":"2025-10-14T02:51:52.200141-07:00"}
 {"id":"bd-19","title":"Refactor duplicate flush logic in PersistentPostRun","description":"PersistentPostRun contains a complete copy of the flush logic instead of calling flushToJSONL(). This violates DRY principle and makes maintenance harder. Refactor to use flushToJSONL() with a force parameter to bypass isDirty check, or extract shared logic into a helper function. Located in cmd/bd/main.go:104-138.","status":"closed","priority":3,"issue_type":"task","created_at":"2025-10-16T20:46:08.971822-07:00","updated_at":"2025-10-18T18:35:11.756336-07:00","closed_at":"2025-10-18T09:44:24.167574-07:00"}