Fix NFO extraction to handle lockdata+aired but no dateadded

The root issue was that NFO extraction methods required both dateadded
AND lockdata=true to return any data. But "The Chosen" NFOs have
lockdata=true and aired dates but no dateadded field, so extraction
returned None and TIER 2 fallback logic never triggered.

Changes:
- Modified extract_nfoguard_dates_from_nfo() to accept lockdata=true NFOs
- Added support for extracting aired dates from episode NFOs
- Updated logic to return data when lockdata=true regardless of dateadded
- Now TIER 2 will properly apply aired->dateadded fallback logic
- Updated version to 2.0.24

This ensures episodes with incomplete NFO metadata get proper fallback
processing instead of being ignored by the three-tier system.

🤖 Generated with [Claude Code](https://claude.ai/code)

VERSION

@@ -1 +1 @@
-2.0.23
+2.0.24