Improve Autodescription (TSF) integration coverage

[nlemoine]

Summary

Raises The SEO Framework (Autodescription) integration coverage from ~67% to 94%.

The new tests call the public filter methods directly with plain args (no HTTP request / TSF memoization), so they're fast and deterministic.

Coverage

• Autodescription.php (0% → 100%) — composite isSupported() / registerHooks() boot.
• QueryType.php (40% → 100%) — markPfcptAsSingularArchive: the already-a-singular-archive short-circuit, and the explicit-id resolution path.
• Breadcrumbs.php (78% → 92.5%) — addPfcptPageCrumb argument-resolution guards: non-int/non-WP_Post id, missing post, non-string taxonomy, unknown taxonomy, a real taxonomy with no PFCPT-bound post type, and the no-match fall-through.

The 5 remaining Breadcrumbs lines are defensive guards in the query-based resolution path (get_post_type() returning non-string, queried object not a WP_Term, etc.) that can't be reached without a malformed query state.

Checks

11 → 16 tests pass; phpcs clean. No src/ changes.

[codecov-commenter]

Codecov Report

✅ All modified and coverable lines are covered by tests.
✅ Project coverage is 91.86%. Comparing base (7e45b27) to head (4297a59).

Additional details and impacted files

@@             Coverage Diff              @@
##               main      #20      +/-   ##
============================================
+ Coverage     90.34%   91.86%   +1.52%     
  Complexity      485      485              
============================================
  Files            31       31              
  Lines          1315     1315              
============================================
+ Hits           1188     1208      +20     
+ Misses          127      107      -20     

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