feat(worktree): auto-apply cwd-based project remap on worker startup

Ports scripts/cwd-remap.ts into ProcessManager.runOneTimeCwdRemap() and
invokes it in initializeBackground() alongside the existing chroma
migration. Uses pending_messages.cwd as the source of truth to rewrite
pre-worktree bare project names into the parent/worktree composite
format so search and context are consistent.

- Backs up the DB to .bak-cwd-remap-<ts> before any writes.
- Idempotent: marker file .cwd-remap-applied-v1 short-circuits reruns.
- No-ops on fresh installs (no DB, or no pending_messages table).
- On failure, logs and skips the marker so the next restart retries.

Co-Authored-By: Claude Opus 4.7 (1M context) <noreply@anthropic.com>

src/services/worker-service.ts

@@ -45,6 +45,7 @@ import {
   getPlatformTimeout,
   aggressiveStartupCleanup,
   runOneTimeChromaMigration,
+  runOneTimeCwdRemap,
   cleanStalePidFile,
   isProcessAlive,
   spawnDaemon,
@@ -359,6 +360,10 @@ export class WorkerService {
         runOneTimeChromaMigration();
       }
 
+      // One-time remap of pre-worktree project names using pending_messages.cwd.
+      // Must run before dbManager.initialize() so we don't hold the DB open.
+      runOneTimeCwdRemap();
+
       // Initialize ChromaMcpManager only if Chroma is enabled
       const chromaEnabled = settings.CLAUDE_MEM_CHROMA_ENABLED !== 'false';
       if (chromaEnabled) {