feat: schelet gateway FastAPI (API v1 + worker + dashboard + SQLite WAL)
Structura repo conform plan.md sect. 4, booteaza cu /healthz verde:
- app/main.py: FastAPI (lifespan init_db), /healthz (worker viu + last login + queue), /metrics
- app/api/v1: POST /v1/prezentari (enqueue + dedup idempotency UNIQUE), GET prezentari/{id}, nomenclator, mapari
- app/rar_client.py: client RAR real (login/JWT, nomenclator, postPrezentare, getFinalizate) cu User-Agent obligatoriu (fix WAF 403)
- app/worker: proces separat, claim atomic BEGIN IMMEDIATE, heartbeat, login+send (send dezactivat by default)
- app/web: dashboard Jinja2+HTMX (coada, banner alerta blocate, worker viu/mort, stari empty)
- app/db.py + schema.sql: SQLite WAL, tabele accounts/api_keys/operations_mapping/nomenclator_rar/submissions/worker_heartbeat
- app/idempotency.py + payload.py: hash continut canonic + builder payload (status FINALIZATA, fara tipPrestatie)
- Dockerfile + docker-compose.yml (api+worker, volum SQLite persistent, restart:always)
- tools/import_dbf.py: stub T5
Verificat live: login prin rar_client OK (token 259), nomenclator 18 coduri, worker heartbeat -> /healthz worker_alive=True.
Ramas: T3 validare Pydantic, T4 snapshot payload, T2 reconciliere/retry worker, T5 import DBF, auth API-key, middleware redactare creds, criptare PII.
Co-Authored-By: Claude Opus 4.8 (1M context) <noreply@anthropic.com>
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