[self-care:open-source-failures] Fix recurring safe output processing failures in Dev Practices / Well-Architected

`Dev Practices / Well-Architected` in `githubnext/gh-aw-cao` has failed at least five times in the last seven days at the `safe_outputs` job's `Process Safe Outputs` step, which indicates a recurring post-agent delivery failure rather than a single transient run. The bounded snapshot supports a workflow-level delivery defect but does not show the underlying processor error, so the immediate fix should focus on capturing and reviewing the safe-output payload and processor diagnostics for this workflow.

**Action:** CAO maintainers should inspect the `safe_outputs` payload and processor logs for this workflow, then patch the workflow or emitted payload shape; accept when a new `Dev Practices / Well-Architected` run completes past `Process Safe Outputs` and the next snapshot shows no new enriched failures for this signature.

Agent prompt
Investigate `.github/workflows/software-development-practices-github-well-architected.lock.yml` failures that stop at `safe_outputs` / `Process Safe Outputs`. Identify the emitted safe-output operation(s), compare them with the declared safe-output schema, fix the workflow or payload construction so the processor accepts the output, and add the smallest regression test or validation that would have caught the mismatch. Summarize the root cause and include evidence from one repaired run.

Critical findings:
- Severity: P0 because repeated delivery failure blocks workflow completion after agent work.
- Run count: 5 enriched failures in the bounded snapshot.
- Representative run: https://github.com/githubnext/gh-aw-cao/actions/runs/33974967328
- Probable cause: malformed, unsupported, or otherwise rejected safe-output payload; more processor evidence is still required for a precise root cause.
- Confidence: medium.

Observed runs

- https://github.com/githubnext/gh-aw-cao/actions/runs/33974967328
- https://github.com/githubnext/gh-aw-cao/actions/runs/33974962489
- https://github.com/githubnext/gh-aw-cao/actions/runs/33974942250
- https://github.com/githubnext/gh-aw-cao/actions/runs/33974936427
- https://github.com/githubnext/gh-aw-cao/actions/runs/33974919836

Workflow: `.github/workflows/software-development-practices-github-well-architected.lock.yml`
Signature: `Process Safe Outputs`

### Control Plane
- Correlation ID: 33977404304-231
- Central repository: githubnext/gh-aw-cao
- Control-plane run: https://github.com/githubnext/gh-aw-cao/actions/runs/33977404304

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> - [x] expires on Sep 19, 2026, 4:26 PM UTC

Start with .github/workflows/software-development-practices-github-well-architected.lock.yml and the representative run's safe_outputs / Process Safe Outputs logs. Inspect the emitted safe-output payload, processor diagnostics, and declared schema, then add the smallest regression validation identified by the mismatch. Done means a new Dev Practices / Well-Architected run passes that step and the next snapshot has no new failures with this signature.

Written by the indexing model from the issue text.