feat: Add option to switch sqlite to WAL (#6050)

Co-authored-by: Michael Genson <71845777+michael-genson@users.noreply.github.com>

mealie/core/settings/settings.py

@@ -196,6 +196,8 @@ class AppSettings(AppLoggingSettings):
     DB_ENGINE: str = "sqlite"  # Options: 'sqlite', 'postgres'
     DB_PROVIDER: AbstractDBProvider | None = None
 
+    SQLITE_MIGRATE_JOURNAL_WAL: bool = False
+
     @property
     def DB_URL(self) -> str | None:
         return self.DB_PROVIDER.db_url if self.DB_PROVIDER else None