Fix 9 backend bugs: pricing, zones, geocoding, device tokens, assignment retry

- pricingid null: lookupDoormilePrice now returns matched rule ID; wired to BookingServiceOption.Pricingid
- Zone rename: Interstate→Regional, OtherState→National throughout (code + DB migrated)
- Zone from pincodes: CheckPrice now accepts pickup_pincode+delivery_pincode and auto-resolves zone
- Delivery geocoding: pincodeToLatLon() maps 3-digit prefix to city coords when lat/lon are 0
- Device tokens: device_token field added to PinVerify DTOs; saved on both customer and miler login
- Assignment retry: RejectMilerAssignment now re-triggers AssignCustomerMiler/AssignCRMMiler immediately
- Provider empty B2C: defaults to Doormile when no pricing provider row matches
- City gate 422→400: StatusUnprocessableEntity corrected to StatusBadRequest
- Miler GPS 0,0: WS tracking falls back to MilerProfile DB coords when Redis key is expired

Co-Authored-By: Claude Sonnet 4.6 <noreply@anthropic.com>

controllers/customerController.go

@@ -151,6 +151,9 @@ func VerifyCustomerPin(cfg *config.Config) fiber.Handler {
 
 		now := time.Now()
 		customer.Lastloginat = &now
+		if req.DeviceToken != "" {
+			customer.Devicetoken = req.DeviceToken
+		}
 		db.DB.Save(&customer)
 
 		token, err := utils.GenerateToken(customer.Appcustomerid, customer.Phone, 9, 0, customer.Configid, cfg.JWTSecret)
@@ -394,6 +397,14 @@ func CreateCustomerBooking(c *fiber.Ctx) error {
 		return utils.BadRequest(c, "at least one parcel is required")
 	}
 
+	// Geocode delivery pincode to lat/lon when the app doesn't supply coordinates.
+	if req.Deliverylatitude == 0 && req.Deliverylongitude == 0 && req.Deliverypincode != "" {
+		if lat, lon, ok := pincodeToLatLon(req.Deliverypincode); ok {
+			req.Deliverylatitude = lat
+			req.Deliverylongitude = lon
+		}
+	}
+
 	tx := db.DB.Begin()
 
 	booking := models.PickupBooking{
@@ -464,8 +475,10 @@ func CreateCustomerBooking(c *fiber.Ctx) error {
 	itemCategory := normalizePricingCategory(req.Parcels[0].Itemcategory)
 
 	var estimatedPrice float64
-	if price, found := lookupDoormilePrice(zone, mapServiceTypeToPricing(serviceType), totalWeight, itemCategory); found {
+	var pricingID *int
+	if price, pid, found := lookupDoormilePrice(zone, mapServiceTypeToPricing(serviceType), totalWeight, itemCategory); found {
 		estimatedPrice = price
+		pricingID = pid
 	} else {
 		var distance float64
 		if booking.Deliverylatitude != 0 && booking.Deliverylongitude != 0 {
@@ -489,6 +502,7 @@ func CreateCustomerBooking(c *fiber.Ctx) error {
 		Bookingid:           booking.Bookingid,
 		Servicetype:         serviceType,
 		Estimatedprice:      estimatedPrice,
+		Pricingid:           pricingID,
 		Estimateddeliveryat: &estDelivery,
 		Sladueat:            &slaDue,
 	}