feat(php): add filesystem walk-up detection for Laravel & WordPress + structured logging

[doITmagic]

Description

Implements filesystem-based framework detection by walking UP parent directories, replacing the previous approach that only checked the immediate file/directory level. This dramatically improves detection accuracy for deeply nested PHP files in both Laravel and WordPress projects.

• Laravel: Walk UP parent directories looking for artisan or composer.json containing laravel/framework dependency. Results are cached via laravelCache to avoid repeated os.Stat calls across files in the same project.
• WordPress: Walk UP parent directories looking for wp-config.php, wp-content, wp-includes, wp-admin, or plugin/theme headers (Plugin Name:, Theme Name: in style.css). Results are cached via wordpressCache.
• Structured Logging: Replaced all fmt.Fprintf(os.Stderr, ...) calls with logger.Instance.{Debug,Info,Warn,Error} throughout the PHP parser pipeline, adding detailed enrichment pipeline logging (chunks before/after, route files, enricher applicability).
• Version Bump: Bumped version to 2.1.86.

Key Changes & Impact:

• pkg/parser/php/analyzer.go — Laravel walk-up detection with isLaravelByFilesystem() + laravelCache
• pkg/parser/php/laravel/enricher.go — Structured logging for enrichment pipeline (route files, migrations, chunk counts)
• pkg/parser/php/wordpress/analyzer.go — WordPress walk-up detection with isWordPressByFilesystem()
• pkg/parser/php/wordpress/enricher.go — Structured logging for WordPress enrichment
• pkg/parser/php/php_analyzer.go — Logging for enricher applicability and chunk enrichment flow

Type of change

• Bug fix (non-breaking change which fixes an issue)
• New feature (non-breaking change which adds functionality)
• Breaking change (fix or feature that would cause existing functionality to not work as expected)
• Documentation update

Checklist:

• I have performed a self-review of my own code
• I have formatted my code with go fmt ./...
• I have run tests go test ./... and they pass
• I have verified integration with Ollama/Qdrant (if applicable)
• I have updated the documentation accordingly

[Copilot]

Pull request overview

Adds filesystem “walk-up” framework detection to the PHP pipeline to better classify deeply nested files as Laravel/WordPress projects, and replaces stderr printing with the repo’s structured logger.

Changes:

• Implement WordPress parent-directory detection via isWordPressByFilesystem() and integrate it into IsWordPressProject.
• Add Laravel parent-directory detection via IsLaravelProjectByPaths()/isLaravelRoot() and extend php.CodeAnalyzer.IsLaravelProject() with filesystem checks + caching.
• Replace various fmt.Fprintf(os.Stderr, ...) calls with logger.Instance.{Debug,Info,Warn,Error}; bump version to 2.1.86.

Reviewed changes

Copilot reviewed 8 out of 8 changed files in this pull request and generated 10 comments.

Show a summary per file

File	Description
pkg/parser/php/wordpress/enricher.go	Adds structured logging around WordPress enrichment flow.
pkg/parser/php/wordpress/analyzer.go	Adds upward filesystem walk WordPress detection helper and calls it from IsWordPressProject.
pkg/parser/php/php_analyzer.go	Adds structured logging for enricher registration/applicability/enrichment and route fallback.
pkg/parser/php/laravel/routes.go	Switches route analysis error output to structured logging.
pkg/parser/php/laravel/migrations.go	Switches migration analysis error output to structured logging.
pkg/parser/php/laravel/enricher.go	Adds Laravel parent-directory walk-up detection and logs enrichment steps.
pkg/parser/php/analyzer.go	Adds framework detection caches; extends Laravel detection with filesystem walk-up + logging.
cmd/rag-code-mcp/main.go	Version bump to 2.1.86.

---

You can also share your feedback on Copilot code review. Take the survey.