Fix DATABASE_URL corruption from special characters in POSTGRES_PASSWORD

app/main.py

@@ -1,6 +1,8 @@
+import logging
 import os
 import secrets
 import shutil
+import time
 from datetime import datetime
 from pathlib import Path
 from typing import Annotated
@@ -12,6 +14,7 @@ from fastapi.responses import HTMLResponse, RedirectResponse
 from fastapi.templating import Jinja2Templates
 from pypdf import PdfReader
 from sqlalchemy import select
+from sqlalchemy.exc import OperationalError
 from sqlalchemy.orm import Session
 from starlette.middleware.sessions import SessionMiddleware
 
@@ -34,7 +37,18 @@ templates = Jinja2Templates(directory=str(Path(__file__).parent / "templates"))
 def startup() -> None:
     if not ADMIN_PASSWORD or not SYNC_API_TOKEN:
         raise RuntimeError("ADMIN_PASSWORD and SYNC_API_TOKEN must be configured")
-    Base.metadata.create_all(bind=engine)
+    # Postgres may briefly restart or lag behind its health check at deploy time.
+    for attempt in range(1, 11):
+        try:
+            Base.metadata.create_all(bind=engine)
+            break
+        except OperationalError as exc:
+            if attempt == 10:
+                raise
+            logging.getLogger("uvicorn.error").warning(
+                "Database not ready (attempt %s/10): %s", attempt, exc.orig
+            )
+            time.sleep(2)
     UPLOAD_DIR.mkdir(parents=True, exist_ok=True)