fix(daemon): complete socket path shortening for long workspace paths (GH#1001) (#1008)

fix(daemon): socket path shortening for long workspace paths

Fixes GH#1001 where long workspace paths (e.g., pytest temp directories) caused
socket path mismatches. The daemon now uses rpc.ShortSocketPath() consistently
with the client.

Changes:
- daemon.go: Use rpc.ShortSocketPath() + EnsureSocketDir() for daemon socket
- daemon_config.go: Update getSocketPathForPID() to use rpc.ShortSocketPath()
- Added tests for long path handling and client-daemon socket path agreement

Co-Authored-By: Eugene Sukhodolin <sukhodolin@users.noreply.github.com>

cmd/bd/daemon.go

@@ -478,7 +478,12 @@ func runDaemonLoop(interval time.Duration, autoCommit, autoPush, autoPull, local
 	// Get workspace path (.beads directory) - beadsDir already defined above
 	// Get actual workspace root (parent of .beads)
 	workspacePath := filepath.Dir(beadsDir)
-	socketPath := filepath.Join(beadsDir, "bd.sock")
+	// Use short socket path to avoid Unix socket path length limits (macOS: 104 chars)
+	socketPath, err := rpc.EnsureSocketDir(rpc.ShortSocketPath(workspacePath))
+	if err != nil {
+		log.Error("failed to create socket directory", "error", err)
+		return
+	}
 	serverCtx, serverCancel := context.WithCancel(ctx)
 	defer serverCancel()