Add assignment engine, FCM, WebSockets, city gate, and internal APIs

- internal/assignment: GEORADIUS miler assignment with retry/escalation,
  customer-side provider scoring, FCM notifications on assign
- internal/notify: Firebase Admin SDK (FCM) client initialisation
- internal/ws: WebSocket handlers for live parcel tracking and
  customer↔miler chat
- middlewares: city gate (pincode prefix validation), internal API key
  auth, WebSocket JWT auth
- controllers: InternalNotify + InternalReassign for machine-to-machine
  calls; pricing helpers wired into CreateCustomerBooking and CreateCRMBooking
- routes: /internal/*, /ws/bookings/:id/track, /ws/bookings/:id/chat
- models/users, models/doormile_pricing: new fields for device tokens,
  assignment state, pricing bands
- seed_data.sql: initial pricing seed rows

.env and Firebase service-account JSON intentionally excluded.

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

controllers/customerController.go

@@ -12,6 +12,7 @@ import (
 	"doormile/constants"
 	"doormile/db"
 	"doormile/dto"
+	"doormile/internal/assignment"
 	"doormile/models"
 	"doormile/utils"
 
@@ -454,34 +455,23 @@ func CreateCustomerBooking(c *fiber.Ctx) error {
 		}
 	}
 
-	var distance float64
-	if booking.Deliverylatitude != 0 && booking.Deliverylongitude != 0 {
-		distance = calculateDistance(booking.Pickuplatitude, booking.Pickuplongitude, booking.Deliverylatitude, booking.Deliverylongitude)
-	}
-
-	var pricing models.Pricing
-	pricingErr := tx.Where("status = ? AND ? BETWEEN effectivefrom AND effectiveto", "Active", time.Now()).Order("priority DESC").First(&pricing).Error
-
-	var estimatedPrice float64
-	var pricingID *int
-	if pricingErr == nil {
-		pricingID = &pricing.Pricingid
-		kmExtra := math.Max(0, distance-pricing.Basedistance)
-		kgExtra := math.Max(0, totalWeight-pricing.Baseweight)
-		estimatedPrice = pricing.Baseprice + (kmExtra * pricing.Priceperkm) + (kgExtra * pricing.Priceperkg) + pricing.Handlingcharges
-	} else {
-		estimatedPrice = 50.0 + (distance * 5.0) + (totalWeight * 10.0)
-	}
-
 	serviceType := req.ServiceOption
 	if serviceType == "" {
 		serviceType = "Normal"
 	}
 
-	if serviceType == "Fast" {
-		estimatedPrice *= 1.25
-	} else if serviceType == "Superfast" {
-		estimatedPrice *= 1.5
+	zone := resolveZone(req.Pickuppincode, req.Deliverypincode)
+	itemCategory := normalizePricingCategory(req.Parcels[0].Itemcategory)
+
+	var estimatedPrice float64
+	if price, found := lookupDoormilePrice(zone, mapServiceTypeToPricing(serviceType), totalWeight, itemCategory); found {
+		estimatedPrice = price
+	} else {
+		var distance float64
+		if booking.Deliverylatitude != 0 && booking.Deliverylongitude != 0 {
+			distance = calculateDistance(booking.Pickuplatitude, booking.Pickuplongitude, booking.Deliverylatitude, booking.Deliverylongitude)
+		}
+		estimatedPrice = 50.0 + (distance * 5.0) + (totalWeight * 10.0)
 	}
 
 	now := time.Now()
@@ -501,7 +491,6 @@ func CreateCustomerBooking(c *fiber.Ctx) error {
 		Estimatedprice:      estimatedPrice,
 		Estimateddeliveryat: &estDelivery,
 		Sladueat:            &slaDue,
-		Pricingid:           pricingID,
 	}
 
 	if err := tx.Create(&srvOption).Error; err != nil {
@@ -521,6 +510,8 @@ func CreateCustomerBooking(c *fiber.Ctx) error {
 
 	tx.Commit()
 
+	go assignment.AssignCustomerMiler(booking.Bookingid)
+
 	if db.Js != nil {
 		payload := map[string]interface{}{
 			"booking_id":       booking.Bookingid,
@@ -642,3 +633,25 @@ func TrackConsignment(c *fiber.Ctx) error {
 		"history":     history,
 	})
 }
+
+func SaveCustomerDeviceToken(c *fiber.Ctx) error {
+	customerID := c.Locals("userid").(int)
+
+	var req struct {
+		DeviceToken string `json:"device_token"`
+	}
+	if err := c.BodyParser(&req); err != nil {
+		return utils.BadRequest(c, "invalid request body")
+	}
+	if req.DeviceToken == "" {
+		return utils.BadRequest(c, "device_token is required")
+	}
+
+	if err := db.DB.Model(&models.AppCustomer{}).
+		Where("appcustomerid = ?", customerID).
+		Update("device_token", req.DeviceToken).Error; err != nil {
+		return utils.Internal(c, "failed to save device token")
+	}
+
+	return utils.Message(c, "device token saved")
+}