Test
9ed6c2638d
- Add internal/history package for pruning workflow history - Implement HistoryPruner with configurable pruning policies - Automatic pruning on size/age/count thresholds - Archive old entries to disk for compliance - Memory-efficient history management - Continue-as-new compatible design - 17 history tests, all passing Features: - AddEntry() for adding task history - Automatic pruning by: - Maximum history size (default 100MB) - Maximum entry age (default 24 hours) - Maximum entry count (default 1000) - Manual Prune() trigger - GetEntries() with filters (status, time range, recent) - UpdateEntry() for status changes - Archive old entries to configurable directory - Clear() to reset history Pruning Strategy: - Entries sorted by end time (oldest first) - Remove entries exceeding any threshold - Archive to disk for historical analysis - Keep recent entries for debugging - 90% threshold triggers auto-pruning Memory Management: - Constant memory growth even with 1000s of tasks - Estimated size calculated per entry - Size ratio tracked (current vs max) - Memory info reporting Statistics: - Total size and entry count - Average entry size - Prune and archive counts - Last prune timestamp - Usage ratio (%) - Memory growth rate Archival: - Optional archive directory - Entries saved as JSON for analysis - Timestamp included in filename - Non-blocking archive operations Test Coverage: - 17 history tests (add, query, prune, archive) - Constant memory growth verified (1000 tasks) - Age-based pruning verified - Archive directory creation tested - Status filtering tested - Recent entries retrieval tested - Update operations tested - Policy defaults verified Verification: - Memory stays within bounds ✓ - Old entries pruned correctly ✓ - Recent entries preserved ✓ - Archive functionality working ✓ - Concurrent safe (RWMutex) ✓ Next: T2.8 (Distributed lock optimization)