Adds scripts/workers/services/ucr_playwright.py — a UCR.gov National Registration
System automation that, given a USDOT + fleet size, runs the register/pay flow,
pays the federal UCR fee with the matched PW filing card (Relay/Stripe Issuing),
and captures a confirmation screenshot + number. Conventions match
boc3_playwright / fmcsa_web_submitter: dev-mode dry-run guard, undetected
(patchright) browser, CAPTCHA detection, screenshot evidence, dataclass result.
Safety: verifies the displayed fee against the federal schedule before paying and
refuses to auto-charge a surprising amount (UCR_MAX_AUTO_FEE_USD) — falls back to
manual filing instead.
Wires it into MCS150UpdateHandler: when an approved (admin_approved) order has
slug ucr-registration, _file_ucr_registration runs the automation, uploads the
confirmation screenshot to MinIO, records filing_status + confirmation, and sets
fulfillment_status=completed on success. On CAPTCHA / fee-mismatch / failure it
reverts to ready_to_file with a high-priority 'file manually' todo. This replaces
the old behavior where approving a UCR just sat at authorization_signed.
