Fix: strip PostgreSQL server_default from email_inbound_token for SQLite

The email_inbound_token column uses a PostgreSQL-only server_default
(gen_random_bytes/encode/trim) that SQLite cannot parse.
Strip the server_default before metadata.create_all() in both the
sync engine and async db_engine fixtures so tests run against SQLite.

Co-Authored-By: Paperclip <noreply@paperclip.ing>

tests/conftest.py

@@ -53,6 +53,10 @@ def disable_rate_limiting():
 def engine():
     """Sync in-memory SQLite engine for model unit tests."""
     eng = create_engine("sqlite:///:memory:")
+    from cartsnitch_api.models.user import User
+
+    col = User.__table__.columns["email_inbound_token"]
+    col.server_default = None
     Base.metadata.create_all(eng)
     yield eng
     eng.dispose()
@@ -77,6 +81,9 @@ async def db_engine():
         cursor.close()
 
     async with engine.begin() as conn:
+        from cartsnitch_api.models.user import User
+
+        User.__table__.columns["email_inbound_token"].server_default = None
         await conn.run_sync(Base.metadata.create_all)
         # Create Better-Auth tables (not managed by SQLAlchemy models)
         await conn.execute(