implementation_priority_v2

After v1 implementation_priority is solid:
1. context_model_layers types: sources → signals → synthesis contracts
( extend analytical context model; keep v1 dimensions as sources ). ✓
2. Seed signal producers: development_history_signals,
requirement_lifecycle_signals, relationship_signals, risk_signals
from index + git ( reimagined, not staged / unstaged-only ). ✓ ( thin )
3. synthesized_context rollups for focus entity ( stability, confidence,
AI risk, coverage ). ✓
4. First widgets on focus hero: stability_meter, dependency_pulse,
timeline_ribbon, churn_heat_bar. ✓
5. requirement_card in search / Ideas Summary lists;
context_fingerprint + ai_readiness_gauge on AI context export. ✓
6. Graph overlays: hotspot_overlay, impact_radius. ✓
7. Workspace glance: project_weather, activity_river,
architectural_map. deferred
8. Deeper storytelling: historical_replay_slider, semantic_diff_viewer,
relationship_cloud, traceability_matrix. deferred

Status: in-progress

Interactive page: implementation_priority_v2