GRM-139: feat: adopt documentation-as-code enhancements from devx

.gitea/workflows/ci.yml

@@ -36,6 +36,24 @@ jobs:
         run: |
           . .venv/bin/activate 2>/dev/null || true
           python3 -m devx.ci.lint_docs --root .
+      - name: Documentation version reference check
+        env:
+          PYTHONPATH: src
+        run: |
+          . .venv/bin/activate 2>/dev/null || true
+          python3 -m devx.tools.check_doc_versions --root . --package grm
+      - name: Vale prose lint check
+        env:
+          PYTHONPATH: src
+        run: |
+          . .venv/bin/activate 2>/dev/null || true
+          export PATH="$HOME/.local/bin:$PATH"
+          # Install vale if not present
+          if ! command -v vale >/dev/null 2>&1; then
+            python3 -m devx.tools.install_tools --tool vale
+          fi
+          vale sync
+          vale --minAlertLevel=error docs/ AGENTS.md README.md
       - name: Translation completeness check
         run: |
           . .venv/bin/activate 2>/dev/null || true