feat(rates): last-mile rate rules with bulk per-ton-km and container distance bands

- rates: min_km/max_km columns, PER_TON_KM unit, ETB|USD currency for last mile
- extend UQ_rates_pattern with band start; overlap + shape validation
- shared last-mile charge resolver; approve-dialog price estimate endpoint
- delivery-fee invoice prices via rules, falls back to vehicle price/km
- backoffice: last-mile rate form (mode, container type, band, currency)

apps/edr-freight-api/src/modules/bookings/booking-pricing.service.ts

@@ -727,8 +727,16 @@ export class BookingPricingService {
 
     for (const leg of legs) {
       if (!leg.active) continue;
+      // New-style last-mile rates (PER_TON_KM bulk / distance-banded PER_KM)
+      // price the operational leg via last-mile-charge.util, not the booking
+      // quote — this legacy lookup must never pick one up.
       const rate = liveRates.find(
-        (r) => r.rateType === leg.rateType && r.currency === 'USD' && r.status === 'LIVE',
+        (r) =>
+          r.rateType === leg.rateType &&
+          r.currency === 'USD' &&
+          r.status === 'LIVE' &&
+          r.rateUnit !== 'PER_TON_KM' &&
+          r.minKm == null,
       );
       if (!rate) continue;