3195b8062b
- New 'bd duplicates' command finds content duplicates across database - Groups by content hash (title, description, design, acceptance criteria) - Chooses merge target by reference count or smallest ID - Supports --auto-merge and --dry-run flags - Added --dedupe-after flag to 'bd import' for post-import detection - Comprehensive test coverage for duplicate detection - Updated AGENTS.md and ADVANCED.md with usage examples Amp-Thread-ID: https://ampcode.com/threads/T-6f99566f-c979-43ed-bd8f-5aa38b0f6191 Co-authored-by: Amp <amp@ampcode.com>