feat(compact): Access database compact & repair API + CLI

- API: POST /api/compact (optional body {"files": [...]})
- CLI: python main.py compact [--db FILE]
- Local path: rename → CompactDatabase(bak→src) → delete bak (zero copy)
- UNC path: copy to local temp → compact → copy back (avoids DAO segfault)
- Uses DAO DBEngine.CompactDatabase via pywin32 COM
- new dep: pywin32>=306

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

src/sync/web/app.py

@@ -13,6 +13,7 @@ from fastapi import FastAPI
 from ..config import SyncConfig
 from ..health import ServiceState
 from . import deps
+from .routes import compact as compact_routes
 from .routes import health as health_routes
 
 
@@ -29,5 +30,6 @@ def create_app(state: ServiceState, cfg: SyncConfig) -> FastAPI:
         openapi_url="/api/openapi.json",
     )
     deps.bind(state, cfg)
+    app.include_router(compact_routes.router)
     app.include_router(health_routes.router)
     return app