magdev 17728e81d9 Security audit fixes: regex hardening, performance, and code quality (v1.1.2) ...

- WidgetRenderer: single regex for h2→h4 prevents mismatched tags
- ContextBuilder: O(n) comment tree with parent-indexed lookup map
- ContextBuilder: consolidated sidebar queries into single check
- ContextBuilder: transient caching for sidebar recent posts and tags
- functions.php: hex-to-RGB consolidation, type hints, ctype_xdigit validation
- Transient invalidation hooks for save_post and tag CRUD operations

Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>

2026-03-01 01:02:12 +01:00

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