[self-care:open-source-failures] Repair shared activation artifact uploads in gh-aw-workshop workflows

Repeated activation failures in `githubnext/gh-aw-workshop` are blocking multiple workflows at `Upload activation artifact`. The bounded snapshot shows 5 runs across 5 workflows failing at the same activation step, which points to a shared activation-artifact publishing problem rather than isolated workflow logic defects.

**Action:** `githubnext/gh-aw-workshop` maintainers should inspect the shared activation artifact upload path and re-run one affected workflow after a bounded fix; accept when at least one previously failing workflow uploads its activation artifact successfully.

Agent prompt
Inspect the shared activation job used by workshop workflows and fix the cause of the `Upload activation artifact` failure without changing workflow scope. Check artifact naming, path creation, retention/config inputs, and required permissions for the upload step. After the fix, re-run one affected workflow and confirm the activation artifact uploads successfully.

Critical findings:
- Severity: P0
- Repository: `githubnext/gh-aw-workshop`
- Affected workflows in bounded evidence: `Title Similarity Review`, `Workshop Builder`, `Workshop Order Review`, `Workshop Link Checker`, `Workshop UI Screenshot Generator`
- Run count in bounded snapshot: 5
- Representative run: https://github.com/githubnext/gh-aw-workshop/actions/runs/33950420537
- Evidence-supported cause: shared activation artifact upload path or permission failure at the activation step
- Confidence: medium

Representative run evidence

- https://github.com/githubnext/gh-aw-workshop/actions/runs/33950420537 — `Title Similarity Review` — `activation` / `Upload activation artifact`
- https://github.com/githubnext/gh-aw-workshop/actions/runs/33950380965 — `Workshop Builder` — `activation` / `Upload activation artifact`
- https://github.com/githubnext/gh-aw-workshop/actions/runs/33950041261 — `Workshop Order Review` — `activation` / `Upload activation artifact`
- https://github.com/githubnext/gh-aw-workshop/actions/runs/33947769037 — `Workshop Link Checker` — `activation` / `Upload activation artifact`
- https://github.com/githubnext/gh-aw-workshop/actions/runs/33947288155 — `Workshop UI Screenshot Generator` — `activation` / `Upload activation artifact`

### Control Plane
- Correlation ID: 33952682171-207
- Central repository: githubnext/gh-aw-cao
- Control-plane run: https://github.com/githubnext/gh-aw-cao/actions/runs/33952682171

> Generated by [SelfCare / Open Source Failures](https://github.com/githubnext/gh-aw-cao/actions/runs/33952849105) · pi · gpt54 · 24.1 AIC · ⌖ 8.64 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 19, 2026, 7:38 AM UTC

Start with the shared activation job used by the five affected gh-aw-workshop workflows and inspect the Upload activation artifact step, including its artifact name, path, retention or configuration inputs, and permissions. Re-run the representative Title Similarity Review workflow after a bounded fix and confirm that the activation artifact uploads successfully.

Written by the indexing model from the issue text.