[P1] Mountable FastAPI ingest router

[thorwhalen]

heed ships its own APIRouter so it runs standalone and mounts into enlace.

• POST /report (multipart: screenshot + JSON fields) → validate → store → sink
• Expose as APIRouter + a standalone app factory
• enlace integration via include_router (NOT .mount()); auth via Depends so enlace_auth binds identity when present
• dol-backed attachment + report store

Constraint: no enlace import at module load (lazy, optional extra). Design: design.md (Architecture, enlace) · #1

[thorwhalen]

Delivered in #10: process_submission (pure core) + make_router (mountable APIRouter, include_router-friendly, user_dependency seam) + make_app, with core + router (TestClient) tests. Closing. Proper enlace mount/identity wiring firms up with the enlace-integration work.