Phase 4: task-to-goal integration (Vision side)

Build the boundary the ImpactFlow core time-tracker plugs into. A task maps to
a foundation — one of the six stable profile elements (love, strength, mission,
vocation, short_term, long_term) — so the tracker can ask "which goal does this
build toward?" and post the answer back to Vision.

- Models + migration 006: task_mapping (one row per logged time entry).
- app/services/foundations.py: the six foundations + a pure, testable
  work-pattern aggregator (rollup) and a plain-language summary.
- app/routers/integration.py (user-scoped; tracker calls as the user or via
  X-API-Key): GET /foundations, POST/GET /task-mappings,
  GET /work-patterns?days=N (per-foundation minutes/share/neglected).
- Reminder engine now pulls from real work patterns: CheckinCoach takes an
  optional work-pattern summary (last 14 days) and reflects where time has gone
  against the person's own words — an observation, never a verdict.
- Frontend: dashboard.html (time per foundation + neglected); linked from
  profile.html.

Documented the core-tracker integration contract in the README. Phase 4
completes the Vision module's roadmap on the Discovery side; the core tracker
integrates by calling these endpoints.

Tests: 86 passing (added pure-aggregator, integration-endpoint, and
work-pattern-into-check-in tests; run in-container).

Co-Authored-By: Claude Opus 4.8 (1M context) <noreply@anthropic.com>

app/main.py

@@ -16,6 +16,7 @@ from app.routers import (
     auth as auth_router,
     coaching,
     discovery,
+    integration,
 )
 from app.routers.activity import prune_old_activity
 from app.tracking import ActivityTrackingMiddleware
@@ -70,6 +71,7 @@ app.include_router(auth_router.router)
 app.include_router(activity.router)
 app.include_router(discovery.router)
 app.include_router(coaching.router)
+app.include_router(integration.router)
 app.mount("/static", StaticFiles(directory=STATIC_DIR), name="static")