Add safety check before applying default synchronous

Co-authored-by: Tulir Asokan <[email protected]>

Author: Fizzadar

mautrix/util/async_db/aiosqlite.py

@@ -134,7 +134,7 @@ def _add_missing_pragmas(init_commands: list[str]) -> list[str]:
             init_commands.append("PRAGMA foreign_keys = ON")
         if not has_journal_mode:
             init_commands.append("PRAGMA journal_mode = WAL")
-        if not has_synchronous:
+        if not has_synchronous and "PRAGMA journal_mode = WAL" in init_commands:
             init_commands.append("PRAGMA synchronous = NORMAL")
         if not has_busy_timeout:
             init_commands.append("PRAGMA busy_timeout = 5000")