fix: complete better-sqlite3 to bun:sqlite migration

Must Fix:
- Remove better-sqlite3 logic from smart-install.js (5 sections)
- Update all documentation to reference bun:sqlite (7 files)

Should Fix:
- Add defensive break statement in worker-cli.ts:38

Nice to Have:
- Add port validation in ProcessManager.start() (1024-65535)
- Add one-time marker for PM2 cleanup migration
- Verify clearPortCache() wiring (already correct)

Addresses PR #248 review feedback (comment #3648517713)

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

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

plugin/skills/troubleshoot/operations/worker.md

@@ -187,7 +187,6 @@ pm2 delete claude-mem-worker
    ```bash
    cd ~/.claude/plugins/marketplaces/thedotmack/
    ls node_modules/@anthropic-ai/claude-agent-sdk
-   ls node_modules/better-sqlite3
    ls node_modules/express
    ls node_modules/pm2
    ```