fix(mile): only send bookings that bought EDR haulage to the mile queues

The rule that a customer's own truck and an EDR road leg are alternatives
existed on the truck side only (CustomerTruckService.assertSelfHaulPaid).
LastMileService had no counterpart: create checked payment and nothing else,
so any paid booking could be accepted into the queue. A booking took a
customer truck at 06:42 and an EDR last-mile leg with a real EDR truck at
06:47, neither side aware of the other, on a contract that had chosen no
road legs at all.

The road legs are chosen on the contract and copied onto the booking, and
the pickup/delivery address is the only per-booking record of that choice.
service_types cannot serve: every type ships with includes_first_mile and
includes_last_mile set to true, so reading them would mean no booking could
ever self-haul. That same always-true flag had already killed the first-mile
guard, whose `address || serviceType.includesFirstMile` admitted every paid
export booking.

One shared rule now answers it for both sides, so the two halves cannot
drift apart again: last-mile create rejects a booking that chose no road
legs and one already carrying a customer truck; first-mile no longer honours
the service-type flag; the customer-truck guard reads the same helper.

Existing legs are untouched — the guards are on creation, so the one booking
already carrying both needs a human to reconcile it.

Co-Authored-By: Claude Opus 4.8 <noreply@anthropic.com>

apps/edr-freight-api/src/modules/first-mile/first-mile.service.ts

@@ -333,10 +333,12 @@ export class FirstMileService {
     firstMilePickupAddress?: string | null;
     serviceType?: { includesFirstMile?: boolean | null } | null;
   }): boolean {
+    // The pickup address is the only record of what the contract chose.
+    // `serviceType.includesFirstMile` used to satisfy this too, but every
+    // service type ships with it set to true, so the OR made the address check
+    // dead and admitted every paid export booking into the queue.
     return Boolean(
-      booking.tradeDirection === 'EXPORT' &&
-      (booking.firstMilePickupAddress?.trim() ||
-        booking.serviceType?.includesFirstMile),
+      booking.tradeDirection === 'EXPORT' && booking.firstMilePickupAddress?.trim(),
     );
   }