Fix worker crash: remove broken gunicorn post_fork hook

Co-authored-by: Cursor <cursoragent@cursor.com>

app/__init__.py

@@ -60,6 +60,20 @@ def create_app(setup_database=True):
 
     register_cli(app)
 
+    # Ensure models are registered even when DB setup runs in init_db.py.
+    with app.app_context():
+        from app.models import (  # noqa: F401
+            AdBanner,
+            Folder,
+            FolderInvite,
+            FolderMember,
+            PasswordResetToken,
+            Photo,
+            SiteSettings,
+            User,
+            UserGroup,
+        )
+
     @app.context_processor
     def inject_banners():
         from app.banner_service import get_banners_by_position
@@ -71,18 +85,6 @@ def create_app(setup_database=True):
 
     if setup_database:
         with app.app_context():
-            from app.models import (  # noqa: F401
-                AdBanner,
-                Folder,
-                FolderInvite,
-                FolderMember,
-                PasswordResetToken,
-                Photo,
-                SiteSettings,
-                User,
-                UserGroup,
-            )
-
             db.create_all()
 
             if os.getenv("SKIP_DB_INIT") != "1":