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21 teste noi in tests/test_import_e2e.py: - Scenariul 1: upload xlsx/csv -> column-mapping -> preview -> commit -> worker -> FINALIZATA - Scenariul 2: re-upload acelasi continut -> already_sent (nu al doilea POST la RAR) - Scenariul 3: coada MIXTA API(creds efemere)+web(accounts.rar_creds_enc durabil) — T1/Voce#5 - Masina de stari: queued->sending->sent/requeued/error + double-commit 409 + batch committed - Failure registry: RAR 400/403 + reconciliere raspuns pierdut (503) + max_retries->error - T16: purge_expired + purge_after setat la commit si la trimitere Suita completa: 264 passed, 0 failed (fara regresii Treapta 1 sau Treapta 2). Co-Authored-By: Claude Sonnet 4.6 <noreply@anthropic.com>