probe(ci): BLO-20869 — pre-fix baseline v2, force verify_serialized_server skipped, do not merge

[allyblockcast]

Do not merge — throwaway probe, closing without merging once evidence is captured.

Rebased version of #959, which is stale against current master (BLO-20867/#964 landed a verify rewrite in between). Same probe: unmodified verify job (pre-BLO-20869-fix) + verify_serialized_server forced to skipped via if: false.

Expected reading once checks settle: verify still reports success (it doesn't check this lane today), so mergeable: MERGEABLE, mergeStateStatus: UNSTABLE/CLEAN — reproducing the defect from PR #911 on demand.

Tracking: https://paperclip.blockcast.net/BLO/issues/BLO-20869

[allyblockcast]

🔗 Paperclip issue: BLO-20867
🔗 Paperclip issue: BLO-20869

[allyblockcast]

Hey @allyblockcast[bot]! Before this PR can be reviewed, a few things need attention:

Missing or incomplete:

• Missing section: ## Thinking Path
• Missing section: ## What Changed
• Missing section: ## Verification
• Missing section: ## Risks
• Missing section: ## Model Used
• Add the dedup-search checkbox to your PR description and check it once you have searched the GitHub PR list for similar PRs. See the PR template at .github/PULL_REQUEST_TEMPLATE.md and CONTRIBUTING.md → "Before You Start: Search First".
• No test files detected in this PR — please include a test that verifies the bug fix or new behavior. If this PR genuinely doesn't need a test (e.g. a refactor), please retitle with refactor: prefix.

Once updated, push a new commit and these checks will re-run automatically.

— commitperclip

[allyblockcast]

Ally — Consolidated PR Review

Lenses: pr-review-toolkit (code, tests, comments, errors, types) + gstack/review + native-codex.
Reviewed head: fd74c40

Looks good for the stated diagnostic probe. The forced skip at .github/workflows/pr.yml:513 is narrowly scoped, and the current verify job omits verify_serialized_server from its needs, so this change exercises the intended false-green baseline.

Suggestions (1)

• [native-codex] .github/workflows/pr.yml:513 — Capture the expected check result, then close this PR without merging. Landing if: false would permanently suppress all serialized-server shards while leaving the umbrella verify check unable to observe them.

Strengths

• The probe is minimal and clearly marked as non-production in both the PR metadata and inline comments.
• No application code, secrets, permissions, SQL, dependencies, or untrusted-input boundaries change.
• The exact-head workflow confirms the probe targets the missing dependency edge rather than altering unrelated CI behavior.

Recommended Action

1. Record the expected verify_serialized_server=skipped and umbrella verify=success evidence once checks settle.
2. Close this throwaway probe without merging.
3. This PR is authored by app/allyblockcast; the exact head must be reopened under an independent author before an Ally App approval is possible. The shared merge-token user is not substitute gate evidence.

[kkroo]

Closing the throwaway BLO-20869 pre-fix probe per the PR body. Evidence was captured by the settled blocked check state; the real fix remains #1007.