[self-care:open-source-failures] Debug repeated GitHub App token generation failures in Optimization / AI Credit Savings

`Optimization / AI Credit Savings` in `githubnext/gh-aw-cao` is repeatedly failing in the agent job while generating a GitHub App token. The bounded snapshot includes 5 enriched runs with the same failing step and 5 more conclusion-only recurrences in the same workflow, which is enough evidence for a recurring workflow or credential-path defect but not enough to name a more specific cause.

**Action:** A CAO maintainer should debug the GitHub App token generation path for `Optimization / AI Credit Savings` and accept when a new run completes the `Generate GitHub App token` step and the workflow finishes without the same failure signature.

Agent prompt
Assign to Copilot with this prompt:

Investigate why `Optimization / AI Credit Savings` in `githubnext/gh-aw-cao` repeatedly fails at the `Generate GitHub App token` step. Use these representative runs:
- https://github.com/githubnext/gh-aw-cao/actions/runs/33916303423
- https://github.com/githubnext/gh-aw-cao/actions/runs/33916269098
- https://github.com/githubnext/gh-aw-cao/actions/runs/33916243147
- https://github.com/githubnext/gh-aw-cao/actions/runs/33916199124
- https://github.com/githubnext/gh-aw-cao/actions/runs/33916191107

Determine whether the regression is in workflow wiring, inputs, or expected credentials, make the smallest safe fix, and validate with the narrowest relevant checks.

Evidence

Representative run: https://github.com/githubnext/gh-aw-cao/actions/runs/33916303423

Bounded snapshot counts:
- 5 enriched failures with `failureJob: agent` and `failureStep: Generate GitHub App token`
- 5 additional conclusion-only failures in the same workflow during the same seven-day window

Evidence-supported cause:
- Token generation is failing before the workflow can proceed.

Evidence gaps:
- The bounded snapshot does not expose the underlying token-generation error text, so more run-level debugging is required before naming the root cause.

### Control Plane
- Correlation ID: `33920285792-182`
- Central repository: `githubnext/gh-aw-cao`
- Control-plane run: https://github.com/githubnext/gh-aw-cao/actions/runs/33920285792

> Generated by [SelfCare / Open Source Failures](https://github.com/githubnext/gh-aw-cao/actions/runs/33920651044) · pi · gpt54 · 23.4 AIC · ⌖ 8.59 AIC · ⊞ 8.3K · [◷](https://github.com/search?q=repo%3Agithubnext%2Fgh-aw-cao+is%3Aissue+%22gh-aw-workflow-call-id%3A+githubnext%2Fgh-aw-cao%2Fself-care-open-source-failures%22&type=issues)
> - [x] expires on Sep 18, 2026, 9:26 PM UTC

Start by reviewing the logs for the `Generate GitHub App token` step in the five representative workflow runs, then compare the workflow wiring, inputs, and expected credentials for `Optimization / AI Credit Savings`. Confirm the fix with a new run that completes token generation and finishes without the same failure signature.

Written by the indexing model from the issue text.