Remove #[ignore] attributes from tests for features that were already
implemented (miroir-uhj.5.5, miroir-uhj.10, miroir-uhj.12). Update test
expectations to match the actual lenient parsing behavior: invalid header
values are silently ignored rather than causing 400 errors.
Headers affected:
- X-Miroir-Min-Settings-Version: Invalid values treated as None
- Idempotency-Key: No UUID validation, accepts any string
- X-Miroir-Over-Fetch: Invalid values filtered out, < 1 ignored
Also update the implementation status comment to reflect all headers
are now implemented and document the lenient parsing behavior.
Closes: bf-1p9a3
c1dbe3d6d3