Integrate completed #58 corrective stack

[mark-e-deyoung]

This is a non-draft integration candidate for the already-completed #58 corrective stack.

Why this PR exists

The original stacked child PR #60 is fully validated but remains draft. The connected GitHub ready-for-review mutation is currently broken by a connector GraphQL schema defect (Repository.fullDatabaseId). Rather than bypass GitHub's draft protection or require manual UI toil, this PR presents the exact already-validated stacked head directly against main as a fresh integration candidate.

Exact candidate

• head branch: corrective/testing-ceremony-prune
• exact head: 461c2704586a8bcb5d876be30322cb19bff52a60
• includes all parent [SUPERSEDED by #63] #58 replace testing ceremony with capability-driven qualification #59 changes plus #58 P3 prune redundant static policy checks #60 P3 pruning changes
• prior exact-head ordinary CI: 33641479240 PASS

Required fresh evidence before merge

Because the base is now main, this PR must earn fresh evidence for this exact candidate in its final integration shape:

1. ordinary CI PASS;
2. Product Qualification PASS;
3. no unresolved review/mergeability blockers;
4. exact-head guarded merge only after both are observed.

No P4/release qualification, release publication, production signing, or new WBAB platform feature work is authorized.

If this PR merges successfully, #59 and #60 become superseded integration scaffolding and should be closed without further development. Retirement tracker #61 then proceeds against the truthful main.