feat: use our own actions in our workflows (#377)

* feat: use our own actions in our workflows

* fix: add missing inputs to validate-inputs, refactor node

* chore: cr comment fixes

* fix: update-validators formatting

* chore: update validators, add tests, conventions

* feat: validate severity with severity_enum

* feat: add 10 generic validators to improve input validation coverage

Add comprehensive validation system improvements across multiple phases:

Phase 2A - Quick Wins:
- Add multi_value_enum validator for 2-10 value enumerations
- Add exit_code_list validator for Unix/Linux exit codes (0-255)
- Refactor coverage_driver to use multi_value_enum

Phase 2B - High-Value Validators:
- Add key_value_list validator with shell injection prevention
- Add path_list validator with path traversal and glob support

Quick Wins - Additional Enums:
- Add network_mode validator for Docker network modes
- Add language_enum validator for language detection
- Add framework_mode validator for PHP framework modes
- Update boolean pattern to include 'push'

Phase 2C - Specialized Validators:
- Add json_format validator for JSON syntax validation
- Add cache_config validator for Docker BuildKit cache configs

Improvements:
- All validators include comprehensive security checks
- Pattern-based validation with clear error messages
- 23 new test methods with edge case coverage
- Update special case mappings for 20+ inputs
- Fix build-args mapping test expectation

Coverage impact: 22 actions now at 100% validation (88% → 92%)
Test suite: 762 → 785 tests (+23 tests, all passing)

* chore: regenerate rules.yml with improved validator coverage

Regenerate validation rules for all actions with new validators:

- compress-images: 86% → 100% (+1 input: ignore-paths)
- docker-build: 63% → 100% (+4 inputs: cache configs, platform-build-args)
- docker-publish: 73% → 100% (+1 input: build-args)
- language-version-detect: 67% → 100% (+1 input: language)
- php-tests: 89% (fixed framework→framework_mode mapping)
- prettier-lint: 86% → 100% (+2 inputs: file-pattern, plugins)
- security-scan: 86% (maintained coverage)

Overall: 23 of 25 actions now at 100% validation coverage (92%)

* fix: address PR #377 review comments

- Add | None type annotations to 6 optional parameters (PEP 604)
- Standardize injection pattern: remove @# from comma_separated_list validator
  (@ and # are not shell injection vectors, allows npm scoped packages)
- Remove dead code: unused value expression in key_value_list validator
- Update tests to reflect injection pattern changes

.serena/memories/repository_overview.md

@@ -5,13 +5,14 @@
 - **Path**: /Users/ivuorinen/Code/ivuorinen/actions
 - **Branch**: main
 - **External Usage**: `ivuorinen/actions/<action-name>@main`
-- **Total Actions**: 43 self-contained actions
+- **Total Actions**: 44 self-contained actions
+- **Dogfooding**: Workflows use local actions (pr-lint, codeql-analysis, security-scan)
 
 ## Structure
 
 ```text
 /
-├── <action-dirs>/           # 43 self-contained actions
+├── <action-dirs>/           # 44 self-contained actions
 │   ├── action.yml          # Action definition
 │   ├── README.md           # Auto-generated
 │   └── CustomValidator.py  # Optional validator
@@ -25,12 +26,14 @@
 └── Makefile               # Build automation
 ```
 
-## Action Categories (43 total)
+## Action Categories (44 total)
 
 **Setup (7)**: node-setup, set-git-config, php-version-detect, python-version-detect, python-version-detect-v2, go-version-detect, dotnet-version-detect
 
 **Linting (13)**: ansible-lint-fix, biome-check/fix, csharp-lint-check, eslint-check/fix, go-lint, pr-lint, pre-commit, prettier-check/fix, python-lint-fix, terraform-lint-fix
 
+**Security (1)**: security-scan (actionlint, Gitleaks, Trivy scanning)
+
 **Build (3)**: csharp-build, go-build, docker-build
 
 **Publishing (5)**: npm-publish, docker-publish, docker-publish-gh, docker-publish-hub, csharp-publish
@@ -85,3 +88,28 @@ make test       # All tests (pytest + ShellSpec)
 - ✅ Convention-based validation
 - ✅ Test generation system
 - ✅ Full backward compatibility
+
+## Dogfooding Strategy
+
+The repository actively dogfoods its own actions in workflows:
+
+**Fully Dogfooded Workflows**:
+
+- **pr-lint.yml**: Uses `./pr-lint` (was 204 lines, now 112 lines - 45% reduction)
+- **action-security.yml**: Uses `./security-scan` (was 264 lines, now 82 lines - 69% reduction)
+- **codeql-new.yml**: Uses `./codeql-analysis`
+- **sync-labels.yml**: Uses `./sync-labels`
+- **version-maintenance.yml**: Uses `./action-versioning`
+
+**Intentionally External**:
+
+- **build-testing-image.yml**: Uses docker/\* actions directly (needs metadata extraction)
+- Core GitHub actions (checkout, upload-artifact, setup-\*) kept for standardization
+
+**Benefits**:
+
+- Early detection of action issues
+- Real-world testing of actions
+- Reduced workflow duplication
+- Improved maintainability
+- Better documentation through usage examples