feat: replace pr_review with spec-driven CI gates and pr-review skill

Add validate_spec, check_pr_size, fast_molecule, nightly_gate, and
create_dependency_pr CI modules. Remove the monolithic pr_review module
and its tests. Replace pr_review CI steps with validate_spec + check_pr_size
+ curl-based APPROVE. Add spec-driven-development and pr-review skills.
Remove dead get_reviewer_token. Update translations and AGENTS.md.

Closes DEVX-155

Generated with [Devin](https://devin.ai)

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

.gitea/workflows/ci.yml

@@ -106,14 +106,27 @@ jobs:
             --pr-title "$PR_TITLE" \
             --repo "$REPOSITORY" \
             --pr-number "$PR_NUMBER"
-      - name: Run automated PR review
+      - name: Validate spec file
         if: github.event_name == 'pull_request'
+        env:
+          DEVX_TASK_PREFIX: DEVX
+          PYTHONPATH: ${{ env.PYTHONPATH }}
+          HEAD_REF: ${{ github.head_ref }}
         run: |
           . .venv/bin/activate 2>/dev/null || true
-          set -euo pipefail
-          python3 -m devx.ci.pr_review \
-            "${{ github.event.number }}" \
-            "${{ github.repository }}"
+          python3 -m devx.ci.validate_spec \
+            --branch "$HEAD_REF" \
+            --github-output
+      - name: Check PR size
+        if: github.event_name == 'pull_request'
+        env:
+          PYTHONPATH: ${{ env.PYTHONPATH }}
+        run: |
+          . .venv/bin/activate 2>/dev/null || true
+          python3 -m devx.ci.check_pr_size \
+            --base "origin/master" \
+            --head "${{ github.event.pull_request.head.sha || github.sha }}" \
+            --github-output
       # --- release-dry-run step (conditional) ---
       - name: Release dry-run validation
         if: steps.detect.outputs.user-facing-changed == 'true'
@@ -165,18 +178,18 @@ jobs:
       - name: Post approval review
         env:
           REVIEWER_GITEA_API_TOKEN: ${{ secrets.REVIEWER_GITEA_API_TOKEN }}
-          CI_GITEA_API_TOKEN: ${{ secrets.CI_GITEA_API_TOKEN }}
           PR_NUMBER: ${{ github.event.number }}
-          REPOSITORY: ${{ github.repository }}
+          GITHUB_SERVER_URL: ${{ github.server_url }}
+          GITHUB_REPOSITORY: ${{ github.repository }}
         run: |
           . .venv/bin/activate 2>/dev/null || true
-          python3 -m devx.ci.pr_review \
-            "$PR_NUMBER" \
-            "$REPOSITORY" \
-            --event APPROVE \
-            --checklist-confirmed \
-            --checklist-categories 1,2,3,4,5,6,7,8,9,10,11,12,13 \
-            --body "Auto-approved: all CI checks passed (validate job)."
+          # Post APPROVE review via Gitea API to satisfy branch protection
+          curl -s -X POST \
+            "${GITHUB_SERVER_URL}/api/v1/repos/${GITHUB_REPOSITORY}/pulls/${PR_NUMBER}/reviews" \
+            -H "Authorization: token ${REVIEWER_GITEA_API_TOKEN}" \
+            -H "Content-Type: application/json" \
+            -d '{"event":"APPROVED","body":"Auto-approved: all CI checks passed (validate job)."}' \
+            || echo "::warning::Failed to post approval review (best-effort)."
       - name: Squash merge with task ID
         env:
           CI_GITEA_API_TOKEN: ${{ secrets.CI_GITEA_API_TOKEN }}