Petru Paler
e9d3f34994
Implements Step 5.3 - selection validation for optimistic locking: - SelectionContext: holds client's filter, resolved_ids, roster_hash, ts_utc - SelectionDiff: shows added/removed animals on mismatch - SelectionValidationResult: validation result with diff if applicable - validate_selection(): re-resolves at ts_utc, compares hashes, returns diff - SelectionMismatchError: exception for unconfirmed mismatches Tests cover: hash match, mismatch detection, diff correctness, confirmed bypass, from_location_id in hash comparison. 🤖 Generated with [Claude Code](https://claude.com/claude-code) Co-Authored-By: Claude Opus 4.5 <noreply@anthropic.com>