v0.7.0

Changed

• Breaking: SIGFB signals now require id field in _index.jsonl; existing indices must be rebuilt via memory_health_check(fix=True) or memory_index_upsert
• Breaking: Replaced _improvement_backlog_resolved.json with three new sidecars: _sigfb_resolved.json, _backlog_contributors.json, _trigger_cooldown.json
• aggregate_signals() accepts resolved_ids parameter to exclude resolved signals from aggregation
• analyze_signals() now includes contributor_ids in each candidate for signal-level tracking
• cmd_remove() on improvements section now marks contributor signals as resolved via _sigfb_resolved.json
• _auto_improve_from_signals() filters resolved signals before aggregation, preventing re-generation of resolved backlog items
• Trigger cooldown (e.g. periodic_review) is now managed via _trigger_cooldown.json instead of text-based resolution records

Added

• _signal_event_id() generates deterministic 12-char IDs for each SIGFB signal based on note path, skill, type, description, and ordinal
• build_entry() assigns id to each skill_feedback entry during indexing

Removed

• _improvement_backlog_resolved.json sidecar and all associated functions (_load_improvement_resolutions, _save_improvement_resolutions, _remember_resolved_improvements, _forget_resolved_improvements, _resolved_improvement_key_set, _has_recently_resolved_periodic_review)