Fix unknown options for psycopg2 startup

src/xmpp_api/config/config.py

@@ -1,5 +1,5 @@
 import os
-from typing import Annotated, Self, cast
+from typing import Annotated, Any, Self, cast
 import logging
 
 from pydantic import BaseModel, Field, model_validator
@@ -53,6 +53,9 @@ class _DatabaseConfig(BaseModel):
     # The file to read the database URI from
     uri_file: str | None = Field(default=None)
 
+    # sqlalchemy options for the database connection
+    connect_args: dict[str, Any] = Field(default_factory=dict)
+
     @model_validator(mode="after")
     def validate_secret(self) -> Self:
         if self.uri_plain is None and self.uri_file is None: