ci(grc): stage central self-hosted Product producer

[seonghobae]

Scope

Stage the GRC-owned central workflow_call Product producer on the canonical runner-routing owner #2565. The producer keeps fixed GRC caller admission, same-repository PR policy, dedicated self-hosted group/labels, and no hosted fallback or inherited secrets.

The GRC delta remains four additive paths:

• .github/workflows/grc-product.yml
• docs/doctoring/grc-product-central-execution.md
• docs/templates/grc-product.yml.in
• tests/test_grc_product_reusable_workflow_contract.py

The comparison also exposes #2609's one prerequisite-owned clock fixture. No implementation from either owner is copied.

Current exact-head topology — 2026-10-09

• Exact head: ab4a39d818a1d865852e25a97b4200e08ece0bbb
• Exact tree: 056e49de04c025e2b48ca54c5b53cc11e2612a69
• First ordinary merge: bb5b297be7b99f584ddf0d587e595e3bbdf0fac2, parents prior GRC head 3f832395800efac06690616b322443ca96e55109 and current runner-policy owner ci: stage all workflows on isolated self-hosted runners #2565 a206770680895adba000d7538fc3d5a5b499149e
• Second ordinary merge: current head, parents bb5b297be7b99f584ddf0d587e595e3bbdf0fac2 and current-time fixture owner test(codeql): keep current-time fixtures fresh #2609 8ba032a3df47c8f401a7017ae84302c725c2f9c8
• Base: ci/sdp-all-self-hosted-20261003@a206770680895adba000d7538fc3d5a5b499149e
• The branch advanced with an expected-head protected, non-force update. No rebase or Force Push occurred.
• GitHub comparison is ahead 8 / behind 0 with merge-base exactly ci: stage all workflows on isolated self-hosted runners #2565; effective comparison is five files.

Root cause and repair

The prior GRC head was still based on #2565 predecessor 6e924f32a2dbaa0950709c6d8f1391fc1058ef43, while canonical #2565 had advanced to a206770…. The two heads had diverged and the GRC body named stale owner evidence.

The first ordinary merge refreshes the stack without changing the four GRC files. #2609 is added as a second prerequisite because its test fixture is required for a truthful current-date full-suite result. Runner-routing conflicts introduced through #2609's protected-main ancestry were resolved at the single writer: #2565's CWL CI isolated + cwlab-ci-isolated contracts remain byte-equivalent to the owner.

Exact-tree verification

• GRC + runner-policy + CodeQL-time contracts: 173 passed normally and 173 passed with GITHUB_ACTIONS=true
• Warning-fatal complete repository suite: 5,498 passed, 10 skipped, 40 subtests
• 39/39 workflow YAML files parse
• Python compileall, git diff --check, and clean worktree: GREEN
• The earlier exact four-file source review is retained as historical source evidence, not formal GitHub approval and not transferred as exact-head acceptance.
• Current exact-head CodeQL run 37896130857 is in progress. It was not rerun or replaced.

Activation and publication HOLD

Draft / Proposed / merge HOLD. Draft is required because mutable runner-policy prerequisite #2565 is not runtime-ready: isolated capacity, cleanup canary, terminal exact-head Checks, and qualifying approval remain absent.

• GRC-specific runner handoff remains ContextualWisdomLab/linux-cluster-ops#326.
• The inactive caller template is not a published protected producer pin or product activation.
• GRC PR Document organization required workflow rollout #76 product source is not verified or repaired by this central CI change.
• Effective model auto/LiteLLM relay/key/publisher work remains Integrate personal S1 LiteLLM API into Noema, Strix and OpenCode Review #2560-owned; model-backed workflows remain orchestrator/free.
• No runner relabeling, ACL expansion, credential mutation, blind rerun, bypass, auto-merge, merge, or release is authorized.

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[seonghobae]

Current authority — exact refreshed stack

• Lifecycle: Draft / Proposed / merge HOLD because mutable runner-policy prerequisite ci: stage all workflows on isolated self-hosted runners #2565 remains unready; nonterminal Checks and missing approval are not the reason for Draft.
• Exact head ab4a39d818a1d865852e25a97b4200e08ece0bbb; tree 056e49de04c025e2b48ca54c5b53cc11e2612a69.
• Ordinary topology: merge bb5b297be7b99f584ddf0d587e595e3bbdf0fac2 has parents prior GRC head 3f832395… and current ci: stage all workflows on isolated self-hosted runners #2565 a206770…; current head then has parents bb5b297… and test(codeql): keep current-time fixtures fresh #2609 8ba032a…. Publication used force=false with expected prior head.
• GitHub confirms ahead 8 / behind 0, merge-base exact ci: stage all workflows on isolated self-hosted runners #2565, mechanically mergeable, five-file comparison. The four GRC files are unchanged; the fifth is test(codeql): keep current-time fixtures fresh #2609's prerequisite fixture.
• Verification: 173/173 combined contracts normally and under GITHUB_ACTIONS=true; full warning-fatal suite 5,498 passed, 10 skipped, 40 subtests; 39/39 workflow YAML parse; compileall and diff check GREEN.
• Exact-head CodeQL run 37896130857 is in progress. Reviews 0; unresolved threads 0. It was not rerun or replaced.

This COMMENT is evidence, not approval. No bypass, auto-merge, merge, runner relabeling, ACL expansion, or source-neutral event is authorized.

[seonghobae]

Current authority — exact head efb53f7b44d09614993702e4a20d75c06a190a37

This Draft stack now consumes #2565 causal owner repair 8d4a2eb1061c060360741d4015e4350ffde6a3eb as an ordinary merge parent.

• exact tree: fd2c357652c17ed865a80d3f12dd24251d935488
• base: ci/sdp-all-self-hosted-20261003 at that exact owner head
• child delta remains bounded; the only inherited change is the fail-closed CWL law CI ↔ law-ai-agent-ci contract
• affected contracts: 43 passed normally and 43 passed with GITHUB_ACTIONS=true
• git diff --check: GREEN
• Draft reason remains the mutable owner prerequisite; queued Checks or missing approval are merge blockers only
• no force push, destructive rebase, rerun, or state toggle