chore: remove issue ID references from comments and changelogs

Strip (bd-xxx), (gt-xxx) suffixes from code comments and changelog
entries. The descriptions remain meaningful without the ephemeral
issue IDs.

🤖 Generated with [Claude Code](https://claude.com/claude-code)

Co-Authored-By: Claude Opus 4.5 <noreply@anthropic.com>

internal/storage/sqlite/migrations/015_blocked_issues_cache.go

@@ -7,7 +7,7 @@ import (
 
 // MigrateBlockedIssuesCache creates the blocked_issues_cache table for performance optimization
 // This cache materializes the recursive CTE computation from GetReadyWork to avoid
-// expensive recursive queries on every call (bd-5qim)
+// expensive recursive queries on every call
 func MigrateBlockedIssuesCache(db *sql.DB) error {
 	// Check if table already exists
 	var tableName string

internal/storage/sqlite/migrations/018_tombstone_columns.go

@@ -6,7 +6,7 @@ import (
 )
 
 // MigrateTombstoneColumns adds tombstone support columns to the issues table.
-// These columns support inline soft-delete (bd-vw8) replacing deletions.jsonl:
+// These columns support inline soft-delete, replacing deletions.jsonl:
 // - deleted_at: when the issue was deleted
 // - deleted_by: who deleted the issue
 // - delete_reason: why the issue was deleted
@@ -43,7 +43,7 @@ func MigrateTombstoneColumns(db *sql.DB) error {
 		}
 	}
 
-	// Add partial index on deleted_at for efficient TTL queries (bd-saa)
+	// Add partial index on deleted_at for efficient TTL queries
 	// Only indexes non-NULL values, making it very efficient for tombstone filtering
 	_, err := db.Exec(`CREATE INDEX IF NOT EXISTS idx_issues_deleted_at ON issues(deleted_at) WHERE deleted_at IS NOT NULL`)
 	if err != nil {

internal/storage/sqlite/migrations/019_messaging_fields.go

@@ -6,7 +6,7 @@ import (
 )
 
 // MigrateMessagingFields adds messaging and graph link support columns to the issues table.
-// These columns support inter-agent communication (bd-kwro):
+// These columns support inter-agent communication:
 // - sender: who sent this message
 // - ephemeral: can be bulk-deleted when closed
 // - replies_to: issue ID for conversation threading

internal/storage/sqlite/migrations/023_pinned_column.go

@@ -6,7 +6,7 @@ import (
 )
 
 // MigratePinnedColumn adds the pinned column to the issues table.
-// Pinned issues are persistent context markers that should not be treated as work items (bd-7h5).
+// Pinned issues are persistent context markers that should not be treated as work items.
 func MigratePinnedColumn(db *sql.DB) error {
 	// Check if column already exists
 	var columnExists bool

internal/storage/sqlite/migrations/026_additional_indexes.go

@@ -6,14 +6,14 @@ import (
 )
 
 // MigrateAdditionalIndexes adds performance optimization indexes identified
-// during schema review (bd-h0we).
+// during schema review.
 //
 // Indexes added:
-//   - idx_issues_updated_at: For GetStaleIssues date filtering (bd-bha9)
-//   - idx_issues_status_priority: For common list query patterns (bd-a9y3)
-//   - idx_labels_label_issue: Covering index for label lookups (bd-jke6)
-//   - idx_dependencies_issue_type: For blocked issues queries (bd-8x3w)
-//   - idx_events_issue_type: For close reason queries (bd-lk39)
+//   - idx_issues_updated_at: For GetStaleIssues date filtering
+//   - idx_issues_status_priority: For common list query patterns
+//   - idx_labels_label_issue: Covering index for label lookups
+//   - idx_dependencies_issue_type: For blocked issues queries
+//   - idx_events_issue_type: For close reason queries
 func MigrateAdditionalIndexes(db *sql.DB) error {
 	indexes := []struct {
 		name string

internal/storage/sqlite/migrations/027_gate_columns.go

@@ -5,7 +5,7 @@ import (
 	"fmt"
 )
 
-// MigrateGateColumns adds gate-related columns to the issues table for async coordination (bd-udsi).
+// MigrateGateColumns adds gate-related columns to the issues table for async coordination.
 // Gate fields enable agents to wait on external conditions (CI completion, human approval, etc.)
 func MigrateGateColumns(db *sql.DB) error {
 	columns := []struct {

internal/storage/sqlite/migrations/030_agent_fields.go

@@ -6,7 +6,7 @@ import (
 )
 
 // MigrateAgentFields adds agent-specific fields to the issues table.
-// These fields support the agent-as-bead pattern (gt-v2gkv, gt-h5sza):
+// These fields support the agent-as-bead pattern:
 //   - hook_bead: current work attached to agent's hook (0..1 cardinality)
 //   - role_bead: reference to role definition bead
 //   - agent_state: agent-reported state (idle|running|stuck|stopped)