Whitelist max_total_rows in the dqlite URL query allowlist

Cycle 9 — ``dqlite://host:port/db?timeout=30&max_total_rows=50000000``
now forwards max_total_rows to the DBAPI, matching the knob added
to the client and dbapi layers. Unknown query keys still raise
ArgumentError so typos surface.

Co-Authored-By: Claude Opus 4.7 (1M context) <noreply@anthropic.com>

Author: antoineleclair

src/sqlalchemydqlite/base.py

@@ -82,7 +82,7 @@ def import_dbapi(cls) -> Any:
 
     # Whitelist of URL query parameters we forward to the DBAPI connect
     # call. Unknown keys raise ``ArgumentError`` so typos surface.
-    _URL_QUERY_ALLOWED: dict[str, type] = {"timeout": float}
+    _URL_QUERY_ALLOWED: dict[str, type] = {"timeout": float, "max_total_rows": int}
 
     def create_connect_args(self, url: URL) -> tuple[list[Any], dict[str, Any]]:
         """Create connection arguments from URL.