internal modifications

internal/assignment/customer_assignment.go

@@ -58,6 +58,11 @@ func AssignCustomerMiler(bookingID int) {
 		"booking_id", bookingID,
 		"max_retries", maxRetries,
 	)
+
+	// Terminal failure — hand off to the AI layer's DispatchAgent, which owns
+	// what happens next (coverage sweep, escalation). Reached only after every
+	// retry is exhausted, so it fires at most once per booking.
+	publishAssignmentFailed(bookingID, reasonNoMilerAvailable)
 }
 
 // tryCustomerAssign performs one full attempt: GEO miler search → provider selection → commit.