- trafficResetDay/Period/At on the shared customer record (omitempty,
inert for the Node panel, which preserves unknown fields)
- housekeeping applies due resets before quota evaluation: period-key
idempotency, short-month clamping (31st fires Feb 28), missed-period
catch-up after panel downtime, traffic suspensions auto-resume
- first sight of a schedule only arms the period marker, never zeroes;
API create/PATCH accept trafficResetDay (0=off) and re-arm on change
- UI: reset-day input + last-reset display in the customer form
- tests: calendar math, apply pass, API lifecycle, persistence;
full Go/Node suites green, difftest formal 50/50
