fix: orphaned-test check uses all_req_ids not filtered req_ids

Tests that cover Draft requirements were incorrectly flagged as
'orphaned' because the coverage check filters out Draft reqs.
Use all_req_ids (before the Draft filter) for orphan detection.

Co-Authored-By: Oz <oz-agent@warp.dev>

Author: tbitcs

src/specsmith/auditor.py

@@ -231,8 +231,9 @@ def check_req_test_consistency(root: Path) -> list[AuditResult]:
             )
         )
 
-    # Orphaned tests
-    orphaned = covered_reqs - req_ids
+    # Orphaned tests: use all_req_ids so tests covering Draft requirements
+    # are not incorrectly flagged as orphaned.
+    orphaned = covered_reqs - all_req_ids
     if orphaned:
         results.append(
             AuditResult(