Checkpoint opt-in MangaDex parser worker

vision/first-party-source-plugins.md

@@ -9,6 +9,9 @@ to do; the diagram describes the target rather than the current implementation.
 Parser-result URL validation and bounded worker messages were added next. The
 opt-in WeebCentral path now validates redirect hops and pins public DNS answers;
 source-specific image CDN allowlists and generic broker integration remain pending.
+MangaDex metadata, feed selection, catalog availability, and at-home page parsing
+now have a second opt-in worker path with fixture parity; its transport still
+uses the existing API client and runner.
 
 ## Decision