Adds explicit order timelines for the 5 CMS provider filings (nppes-update,
npi-reactivation, npi-revalidation, medicare-enrollment, provider-compliance-
bundle) and a +2 business-day buffer applied from the signature step onward,
giving us time to produce + mail the original ink signature while the plotter
station is brought online.
- Buffer only affects post-signature steps; pre-signature steps and all
non-wet-signature services are unchanged (verified with date math).
- Single source of truth: order-timeline route (consumed by the order success
page), so the buffer flows through to the customer-facing ETA.
- Remove WET_SIGNATURE_BUFFER_DAYS once the ink-signature station is in
steady-state (see docs/plans/plotter-plan.md).
API tsc clean; buffer compiled into dist.
41df4d9553