fix: use kireto token for auto-merge approval review

REVIEWER_GITEA_API_TOKEN (emil) is the same user that creates PRs,
so Gitea ignores the self-approval. Switch to
DEVELOPER_GITEA_API_TOKEN (kireto) — a different user — so the
approval counts toward branch protection.

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Co-Authored-By: Devin <158243242+devin-ai-integration[bot]@users.noreply.github.com>

.gitea/workflows/ci.yml

@@ -299,16 +299,18 @@ jobs:
         run: make setup-image EXTRAS=ci
       - name: Post approval review
         env:
-          REVIEWER_GITEA_API_TOKEN: ${{ secrets.REVIEWER_GITEA_API_TOKEN }}
+          DEVELOPER_GITEA_API_TOKEN: ${{ secrets.DEVELOPER_GITEA_API_TOKEN }}
           PR_NUMBER: ${{ github.event.number }}
           GITHUB_SERVER_URL: ${{ github.server_url }}
           GITHUB_REPOSITORY: ${{ github.repository }}
         run: |
           . .venv/bin/activate 2>/dev/null || true
           # Post APPROVE review via Gitea API to satisfy branch protection
+          # Uses DEVELOPER_GITEA_API_TOKEN (kireto) — a different user than
+          # the PR creator — so Gitea counts the approval (no self-approvals).
           curl -s -X POST \
             "${GITHUB_SERVER_URL}/api/v1/repos/${GITHUB_REPOSITORY}/pulls/${PR_NUMBER}/reviews" \
-            -H "Authorization: token ${REVIEWER_GITEA_API_TOKEN}" \
+            -H "Authorization: token ${DEVELOPER_GITEA_API_TOKEN}" \
             -H "Content-Type: application/json" \
             -d '{"event":"APPROVED","body":"Auto-approved: all CI checks passed (validate, molecule-tests)."}' \
             || echo "::warning::Failed to post approval review (best-effort)."

docs/specs/GRM-171.md

@@ -0,0 +1,28 @@
+# GRM-171: Use kireto token for auto-merge approval review
+
+## Problem
+The auto-merge workflow posts approval reviews with
+`REVIEWER_GITEA_API_TOKEN` (emil), but emil is also the PR creator.
+Gitea ignores self-approvals, so the merge fails with HTTP 405
+`Does not have enough approvals`.
+
+## Approach
+REQ-1: Change the approval review step in `.gitea/workflows/ci.yml` to use
+  `DEVELOPER_GITEA_API_TOKEN` (kireto) instead of
+  `REVIEWER_GITEA_API_TOKEN` (emil), since kireto is a different user
+  than the PR creator.
+
+## Test Plan
+- `make lint-all` passes (workflow-lint validates the YAML)
+- Next auto-merge PR succeeds (approval posted by kireto, merge completes)
+
+## Deploy Plan
+- Merge to master
+
+## Rollback Plan
+- Revert the merge commit
+
+## Acceptance Criteria
+- [x] REQ-1: Change the approval review step in `.gitea/workflows/ci.yml`
+  to use `DEVELOPER_GITEA_API_TOKEN` (kireto) instead of
+  `REVIEWER_GITEA_API_TOKEN` (emil)