feat: add action-validator and clean up CI workflows (#513)

* chore(pre-commit): update hooks and add action-validator

Update uv-pre-commit 0.10.9→0.10.11 and checkov 3.2.508→3.2.510.
Normalize single quotes to double quotes in hook args.
Add action-validator v0.8.0 hook for GitHub Actions validation.

* fix(ci): clean up workflow path filters

Remove non-existent action.yaml paths from action-security workflow.
Fix glob patterns (**.md → **/*.md) in pr-lint workflow.
Remove unused trigger paths (yarn.lock, pnpm-lock.yaml,
requirements.txt, .github/labels.yml, docs/**) from security-suite
and sync-labels workflows.

* feat(make): add lint-actions target for action-validator

Add lint-actions target that runs action-validator via pre-commit.
Include it in the lint dependency list and .PHONY declaration.

* docs: add context-mode routing rules to CLAUDE.md

Add mandatory routing rules section for context-mode MCP plugin,
documenting blocked commands, redirected tools, tool selection
hierarchy, and output constraints.

* fix(lint): resolve action-validator failure on language-version-detect

- Remove unsupported `deprecated: true` from language-version-detect/action.yml
  (deprecation already communicated via description field)
- Scope action-validator pre-commit hook to workflow and action.yml files only
- Make missing pre-commit a hard error in lint-actions target

* fix(deps): update action pins and fix trivy-action version comment

Update SHA-pinned action references to latest versions:
- github/codeql-action v4.32.6 → v4.33.0
- nick-fields/retry v3.0.2 → v4.0.0
- actions/cache v5.0.3 → v5.0.4
- oven-sh/setup-bun v2.1.3 → v2.2.0
- softprops/action-gh-release v2.5.0 → v2.6.1
- github/issue-metrics v4.1.0 → v4.1.1
- shivammathur/setup-php 2.36.0 → 2.37.0
- astral-sh/setup-uv v7.5.0 → v7.6.0
- terraform-linters/setup-tflint v6.2.1 → v6.2.2
- aquasecurity/trivy-action: pin from master to v0.35.0

Fix pinact warning in docker-build by adding missing v prefix
to trivy-action version comment (0.35.0 → v0.35.0).

.pre-commit-config.yaml

@@ -14,7 +14,7 @@ repos:
         types: [markdown, python, yaml]
         files: ^(docs/.*|README\.md|CONTRIBUTING\.md|CHANGELOG\.md|.*\.py|.*\.ya?ml)$
   - repo: https://github.com/astral-sh/uv-pre-commit
-    rev: 0.10.9
+    rev: 0.10.11
     hooks:
       - id: uv-lock
       - id: uv-sync
@@ -67,30 +67,36 @@ repos:
     rev: v3.12.0-2
     hooks:
       - id: shfmt
-        args: ['--apply-ignore']
+        args: ["--apply-ignore"]
         exclude: '^_tests/.*\.sh$'
 
   - repo: https://github.com/shellcheck-py/shellcheck-py
     rev: v0.11.0.1
     hooks:
       - id: shellcheck
-        args: ['-x']
+        args: ["-x"]
         exclude: '^_tests/.*\.sh$'
 
   - repo: https://github.com/rhysd/actionlint
     rev: v1.7.11
     hooks:
       - id: actionlint
-        args: ['-shellcheck=']
+        args: ["-shellcheck="]
 
   - repo: https://github.com/bridgecrewio/checkov.git
-    rev: '3.2.508'
+    rev: "3.2.510"
     hooks:
       - id: checkov
         args:
-          - '--quiet'
+          - "--quiet"
 
   - repo: https://github.com/gitleaks/gitleaks
     rev: v8.30.1
     hooks:
       - id: gitleaks
+
+  - repo: https://github.com/mpalmer/action-validator
+    rev: v0.8.0
+    hooks:
+      - id: action-validator
+        files: '(^\.github/workflows/.*\.ya?ml$|.*/action\.ya?ml$)'