Two bugs found tracing Mitchell Allen's batch CB-95BA6C90 (5 DOT services, card):
1) Worker authorization/signing-link/status emails were sent via
smtplib.SMTP('localhost', 25), which has no MTA in the workers container ->
every send failed '[Errno 111] Connection refused', so customers never got
their e-sign links and orders sat 'awaiting client signature' forever. Routed
all 9 hardcoded localhost:25 sites (state_trucking, mcs150_update, boc3_filing,
hazmat_phmsa, mailbox_setup, dot_esign, completion_emails) through the
authenticated SMTP relay (SMTP_HOST/PORT/STARTTLS/login) + added a shared
worker_email.send_worker_email helper.
2) The ERPNext Sales Order for compliance/compliance_batch was only created in
the /checkout/create-session endpoint, but CARD orders confirm via the Stripe
WEBHOOK -> handlePaymentComplete, which never created the SO. Result: every
webhook-confirmed order had erpnext_sales_order=NULL and workers logged
'Sales Order not found 404' then built from PG. Added idempotent
ensureComplianceSalesOrder() to handlePaymentComplete so ALL payment methods
(card-webhook, PayPal, crypto) create + link the SO.
