Merge pull request #5 from weirdtangent/fix/unbound-local-error-file-name

fix: prevent UnboundLocalError when large recordings are skipped

src/amcrest2mqtt/mixins/helpers.py

@@ -292,6 +292,8 @@ class HelpersMixin:
 
             return file_name
 
+        return None
+
     async def cleanup_old_recordings(self: Amcrest2Mqtt) -> None:
         media_path = self.config["media"].get("path")
         retention_days = self.config["media"].get("retention_days", 7)