Rescue Paperjet v1 implementation

backend/app/main.py

@@ -5,8 +5,8 @@ This is the main entry point. The lifespan handler initializes the database
 and ensures required directories exist on startup.
 """
 
-from contextlib import asynccontextmanager
 from collections.abc import AsyncGenerator
+from contextlib import asynccontextmanager
 from typing import Any
 
 from fastapi import FastAPI, Request
@@ -14,7 +14,8 @@ from fastapi.responses import JSONResponse
 
 from app.api.v1 import router as v1_router
 from app.config import settings
-from app.db import Base, engine
+from app.db import Base, SessionLocal, engine
+from app.services.trash_sweep import prune_auto_versions, sweep_trash
 
 
 @asynccontextmanager
@@ -29,6 +30,12 @@ async def lifespan(app: FastAPI) -> AsyncGenerator[None, None]:
     settings.THUMBNAILS_PATH.mkdir(parents=True, exist_ok=True)
     settings.DATABASE_PATH.parent.mkdir(parents=True, exist_ok=True)
 
+    # Run retention cleanup on every startup. This keeps the single-container
+    # deployment self-maintaining without requiring a separate scheduler.
+    with SessionLocal() as db:
+        sweep_trash(db)
+        prune_auto_versions(db)
+
     yield
 
     # Shutdown: dispose of the engine
@@ -48,6 +55,7 @@ app = FastAPI(
 
 # --- Error handlers ---
 
+
 @app.exception_handler(404)
 async def not_found_handler(request: Request, exc: Any) -> JSONResponse:
     """Consistent 404 error envelope."""