What's Next? 0.15.3 CLEANUP

Internal cleanup only; no intended user-facing behavior changes.

- Removed retired craft reagent/planner logic.
- Removed obsolete CraftingData reagent metadata module.
- English DB Builder remains at LootTracker/EnglishDBBuilder.lua with the same /wn endb command.
- Shared Midnight Craft DB remains bundled and primary.
- Client profession cache is supplemental and now restricted to skillLineIDs present in the bundled current-expansion DB.
- Historical AUDIT files were removed from the release package.
- Bundled English DB and Shared Craft DB remain inside the addon.
