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/doormilePricingController.go

@@ -16,9 +16,9 @@ import (
 
 // Valid enum values
 var validZones = map[string]bool{
-	"Local":      true,
-	"Interstate": true,
-	"OtherState": true,
+	"Local":    true,
+	"Regional": true,
+	"National": true,
 }
 
 var validCategories = map[string]bool{
@@ -158,10 +158,12 @@ func buildPriceResponse(zone, servicetype string, weight float64, rules []models
 // Body: { zone, service_type, weight, category? }
 func CheckPrice(c *fiber.Ctx) error {
 	type req struct {
-		Zone        string  `json:"zone"`
-		ServiceType string  `json:"service_type"`
-		Weight      float64 `json:"weight"`
-		Category    string  `json:"category"`
+		Zone            string  `json:"zone"`
+		ServiceType     string  `json:"service_type"`
+		Weight          float64 `json:"weight"`
+		Category        string  `json:"category"`
+		PickupPincode   string  `json:"pickup_pincode"`
+		DeliveryPincode string  `json:"delivery_pincode"`
 	}
 
 	body := new(req)
@@ -169,11 +171,16 @@ func CheckPrice(c *fiber.Ctx) error {
 		return utils.BadRequest(c, "invalid request body")
 	}
 
+	// Auto-resolve zone from pincodes when not explicitly provided.
+	if body.Zone == "" && body.PickupPincode != "" && body.DeliveryPincode != "" {
+		body.Zone = resolveZone(body.PickupPincode, body.DeliveryPincode)
+	}
+
 	if !validZones[body.Zone] {
 		return c.Status(fiber.StatusBadRequest).JSON(fiber.Map{
 			"success":     false,
 			"message":     "invalid zone",
-			"valid_zones": []string{"Local", "Interstate", "OtherState"},
+			"valid_zones": []string{"Local", "Regional", "National"},
 		})
 	}
 	if !validServiceTypes[body.ServiceType] {
@@ -425,7 +432,7 @@ func WarmPricingCache() {
 	utils.Info("WarmPricingCache: warming pricing cache from Postgres...")
 
 	// Iterate every zone × servicetype combination
-	zones := []string{"Local", "Interstate", "OtherState"}
+	zones := []string{"Local", "Regional", "National"}
 	serviceTypes := []string{"Normal", "Express"}
 
 	warmed := 0
@@ -451,8 +458,8 @@ func GetPricingMeta(c *fiber.Ctx) error {
 	return utils.OK(c, fiber.Map{
 		"zones": []fiber.Map{
 			{"value": "Local", "label": "Local / Same City"},
-			{"value": "Interstate", "label": "Interstate"},
-			{"value": "OtherState", "label": "Other State"},
+			{"value": "Regional", "label": "Regional / Same State"},
+			{"value": "National", "label": "National / Other State"},
 		},
 		"categories": []fiber.Map{
 			{"value": "General", "label": "General Goods"},