Walks batch-*-claims/*.x12 under --ingest-dir, calls submit_file per
file, prints submitted/skipped/failed counts. Exits 0 even on
per-file failures (details in stdout); exits 2 on config-level
errors (no clearhouse, stub mode, missing dir).
This is the canonical outbound path; resubmit-rejected-claims
remains for one-off cases where no DB row is wanted.
SftpClient wrapper lacks a stat() method, so the previous default
factory produced a client whose stat() raised AttributeError — making
the SKIPPED outcome unreachable in production and silently
misclassifying all uploads as SFTP_FAILED. The helper now opens a
paramiko SFTP session directly (same pattern as
resubmit-rejected-claims in cli.py:620-650), so stat() and write_file()
both work end-to-end.
Also: tighten typing (SftpBlock instead of Any), add PAYER_MISMATCH
test, drop duplicate _db fixture, rename misleading test, add class
docstrings to SubmitResult/SubmitOutcome.
Owns the parse → DB write → SFTP upload sequence in one place. CLI
and HTTP thin-call it. DB-first invariant: if add_record raises, no
SFTP call is made. Idempotency: add_record dedupes via s.get(Claim,
claim_id); SFTP layer dedupes via stat().st_size match.
Nora