feat(5.20): US-001/002/003 schema medii per cont + disponibilitate + idempotenta env-aware

US-001: coloane accounts (rar_test/prod_enabled, rar_creds_test/prod_enc,
rar_env_default) + submissions.rar_env; migrare cu backfill din ancora globala
AUTOPASS_RAR_ENV (creds->slot, enabled doar pe mediul cu creds) + recompute
idempotency_key env-aware (AUTO-FIX G + E4/3).
US-002: app/rar_env.py — medii_disponibile + rar_env_efectiv (REQ-DISP/DEFAULT).
US-003: build_key(account_id, canon, rar_env) — test vs prod = trimiteri distincte.

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

app/db.py

@@ -71,11 +71,26 @@ def _migrate(conn: sqlite3.Connection) -> None:
         conn.execute("ALTER TABLE submissions ADD COLUMN batch_id INTEGER")
     if "row_index" not in sub_cols:
         conn.execute("ALTER TABLE submissions ADD COLUMN row_index INTEGER")
+    if "rar_env" not in sub_cols:
+        # PRD 5.20 US-001. Mediul RAR tinta pe submission. Pe DB existent NU lasam
+        # randurile pe DEFAULT 'test': un rand prod pre-migrare etichetat 'test' ar fi
+        # reconciliat de worker (US-006) contra endpoint TEST -> no-match -> re-send prod
+        # = DUPLICAT REAL IREVERSIBIL. Backfill din AUTOPASS_RAR_ENV global (ancora de
+        # migrare) + recompute idempotency_key env-aware. Ruleaza O SINGURA DATA (in
+        # blocul de adaugare a coloanei); pe DB fresh coloana vine din schema.sql (fara rows).
+        conn.execute(
+            "ALTER TABLE submissions ADD COLUMN rar_env TEXT NOT NULL DEFAULT 'test' "
+            "CHECK (rar_env IN ('test', 'prod'))"
+        )
+        _backfill_submissions_rar_env(conn)
 
     # Coloane accounts
     acc_cols = {r["name"] for r in conn.execute("PRAGMA table_info(accounts)").fetchall()}
     if "rar_creds_enc" not in acc_cols:
         conn.execute("ALTER TABLE accounts ADD COLUMN rar_creds_enc TEXT")
+        acc_cols.add("rar_creds_enc")
+    # Medii RAR per cont (PRD 5.20 US-001): activare + slot creds + default, per mediu.
+    _migrate_accounts_medii(conn, acc_cols)
     if "active" not in acc_cols:
         # Conturi existente raman active (default 1).
         conn.execute("ALTER TABLE accounts ADD COLUMN active INTEGER NOT NULL DEFAULT 1")
@@ -164,6 +179,101 @@ def _migrate(conn: sqlite3.Connection) -> None:
         )
 
 
+def _migrate_accounts_medii(conn: sqlite3.Connection, acc_cols: set[str]) -> None:
+    """PRD 5.20 US-001: coloane medii RAR per cont + backfill din ancora globala.
+
+    Adauga (idempotent): rar_test_enabled/rar_prod_enabled (bife activare),
+    rar_creds_test_enc/rar_creds_prod_enc (sloturi creds), rar_env_default.
+
+    Backfill (O SINGURA DATA, cand coloanele tocmai au fost adaugate pe DB existent):
+    creds-ul legacy `rar_creds_enc` apartine mediului `AUTOPASS_RAR_ENV` global de la
+    momentul migrarii (ancora) — il copiem in slotul acelui mediu, activam DOAR acel
+    mediu (celalalt dezactivat) si fixam default-ul pe el. Conturile fara creds raman
+    pe default-urile coloanei (prod on / test off). Migrarea NU presupune env-ul; se
+    bazeaza pe ancora globala, exact cum opera contul inainte de 5.20.
+    """
+    newly_added = "rar_env_default" not in acc_cols
+    if "rar_test_enabled" not in acc_cols:
+        conn.execute(
+            "ALTER TABLE accounts ADD COLUMN rar_test_enabled INTEGER NOT NULL DEFAULT 0 "
+            "CHECK (rar_test_enabled IN (0, 1))"
+        )
+    if "rar_prod_enabled" not in acc_cols:
+        conn.execute(
+            "ALTER TABLE accounts ADD COLUMN rar_prod_enabled INTEGER NOT NULL DEFAULT 1 "
+            "CHECK (rar_prod_enabled IN (0, 1))"
+        )
+    if "rar_creds_test_enc" not in acc_cols:
+        conn.execute("ALTER TABLE accounts ADD COLUMN rar_creds_test_enc TEXT")
+    if "rar_creds_prod_enc" not in acc_cols:
+        conn.execute("ALTER TABLE accounts ADD COLUMN rar_creds_prod_enc TEXT")
+    if "rar_env_default" not in acc_cols:
+        # ALTER nu poate adauga CHECK pe coloana noua in SQLite -> validarea ('test'/'prod')
+        # se face in cod (rar_env.py / rutele de cont). DEFAULT 'prod' (cont client nou).
+        conn.execute("ALTER TABLE accounts ADD COLUMN rar_env_default TEXT NOT NULL DEFAULT 'prod'")
+
+    if not newly_added:
+        return  # coloanele existau deja -> backfill-ul a rulat la o pornire anterioara
+
+    # Are coloana legacy rar_creds_enc randuri de migrat? (Pe DB foarte nou, e absenta.)
+    if "rar_creds_enc" not in acc_cols:
+        return
+    env = get_settings().rar_env if get_settings().rar_env in ("test", "prod") else "test"
+    other = "prod" if env == "test" else "test"
+    slot = f"rar_creds_{env}_enc"
+    conn.execute(
+        f"UPDATE accounts SET {slot} = rar_creds_enc, "
+        f"rar_{env}_enabled = 1, rar_{other}_enabled = 0, rar_env_default = ? "
+        f"WHERE rar_creds_enc IS NOT NULL AND TRIM(rar_creds_enc) <> '' AND {slot} IS NULL",
+        (env,),
+    )
+
+
+def _backfill_submissions_rar_env(conn: sqlite3.Connection) -> None:
+    """PRD 5.20 US-001 (AUTO-FIX G + E4/3): backfill rar_env + recompute idempotency_key.
+
+    Ruleaza O SINGURA DATA, imediat dupa ce coloana `submissions.rar_env` a fost adaugata
+    pe un DB existent. Toate randurile pre-migrare au fost trimise (sau urmeaza) catre
+    mediul `AUTOPASS_RAR_ENV` global — le etichetam cu acel env (NU DEFAULT 'test'), altfel
+    reconcilierea worker-ului ar lovi endpoint-ul gresit -> duplicat ireversibil.
+
+    Recompute `idempotency_key` la forma env-aware (`build_key(account_id, canon, rar_env)`):
+    altfel un re-POST al unui rand legacy (cheie env-less) ar rata randul existent ->
+    duplicat. Recompute-ul e consistent (acelasi env pe toate randurile pre-migrare) deci
+    nu poate crea coliziuni intre randuri care erau deja distincte.
+    """
+    import json as _json
+
+    from .idempotency import build_key, canonicalize_row
+
+    env = get_settings().rar_env if get_settings().rar_env in ("test", "prod") else "test"
+    conn.execute("UPDATE submissions SET rar_env = ?", (env,))
+
+    rows = conn.execute(
+        "SELECT id, account_id, idempotency_key, payload_json FROM submissions"
+    ).fetchall()
+    for r in rows:
+        try:
+            content = _json.loads(r["payload_json"])
+        except (ValueError, TypeError):
+            continue
+        canon = canonicalize_row(content)
+        # Pastreaza prestatiile rezolvate (cod_prestatie/cod_op_service) pentru _op_identity.
+        canon["prestatii"] = content.get("prestatii") or []
+        new_key = build_key(r["account_id"], canon, env)
+        if new_key == r["idempotency_key"]:
+            continue
+        try:
+            conn.execute(
+                "UPDATE submissions SET idempotency_key = ? WHERE id = ?",
+                (new_key, r["id"]),
+            )
+        except sqlite3.IntegrityError:
+            # Coliziune improbabila pe UNIQUE(idempotency_key): lasa cheia veche (no-op),
+            # randul ramane gasibil prin dual-lookup legacy.
+            continue
+
+
 def _now_iso() -> str:
     return datetime.now(timezone.utc).isoformat(timespec="seconds")