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).

terraform-lint-fix/action.yml

@@ -147,7 +147,7 @@ runs:
 
     - name: Setup TFLint
       if: steps.check-files.outputs.found == 'true'
-      uses: terraform-linters/setup-tflint@4cb9feea73331a35b422df102992a03a44a3bb33 # v6.2.1
+      uses: terraform-linters/setup-tflint@b480b8fcdaa6f2c577f8e4fa799e89e756bb7c93 # v6.2.2
       with:
         tflint_version: ${{ inputs.tflint-version }}
 
@@ -256,7 +256,7 @@ runs:
 
     - name: Upload SARIF Report
       if: steps.check-files.outputs.found == 'true' && inputs.format == 'sarif'
-      uses: github/codeql-action/upload-sarif@0d579ffd059c29b07949a3cce3983f0780820c98 # v4.32.6
+      uses: github/codeql-action/upload-sarif@b1bff81932f5cdfc8695c7752dcee935dcd061c8 # v4.33.0
       with:
         sarif_file: ${{ env.VALIDATED_WORKING_DIR }}/reports/tflint.sarif
         category: terraform-lint