fix: console tenant scoping, miler identity spoofing, delivery proof, timezone

Security
- Express console had no tenant scoping at all: LoginAdmin hardcoded tenantid 0
  into every JWT and none of the 85 admin handlers filtered by tenant, so any
  client given a console login would read every other client's bookings,
  customers, pricing and reports. Adds DoormileAuth.Tenantid (nil = Doormile
  staff, unrestricted; set = client, scoped), emits it in the token, and scopes
  reads, guards writes and pins tenantid on create.
- Miler telemetry (/miler/logs, /miler/status, /miler/consignments/logs) took
  userid from the request body, letting any authenticated rider write another
  rider's status and GPS trail — data the dispatch layer reasons over. Identity
  now comes from the token.
- POST /miler/reset-pin was unauthenticated and overwrote a PIN given only a
  phone number, so reset-pin + verify-pin took over any rider account. Now
  requires admin/manager/executive auth.

Correctness
- Date ranges compared the container's UTC clock against timestamps the DB
  writes as IST wall-clock (DSN sets TimeZone=Asia/Kolkata), so "today so far"
  ended 5h30m in the past and silently dropped everything created after noon
  IST from every report. Sets TZ in the image and adds utils.DBNow/DBToday,
  which stay correct regardless of container timezone.
- CreateMiler never set Configid, so console-created riders got the column
  default of 1 while LoginMiler looks up configid 1001 — every such rider was
  unable to log in, reported as "no miler account found".
- Delivery wrote no consignment history row, so a tracking timeline never
  showed the parcel arriving.

Features
- Delivery OTP is now real (crypto/rand, issued to the receiver, verified and
  cleared on delivery) but opt-in per client via Tenant.Requiredeliveryotp,
  defaulting off — friction worth it for a courier parcel, not a food order.
- Express bookings accept pickuplocationid, so the console can name a client
  site (a DailyGrubs kitchen) instead of retyping its address; validated
  against the tenant and carried through to the consignment.
- TenantLocation.Locationname, miler tenantid/hubid, Nagercoil (629) opened.
- PUT /miler/availability accepts both "status" and "availabilitystatus", and
  /miler/location no longer drops speed/heading — both were contract
  mismatches against the doc the Flutter dev was given.

Co-Authored-By: Claude Opus 5 (1M context) <noreply@anthropic.com>

routes/routes.go

@@ -113,7 +113,15 @@ func RegisterRoutes(app *fiber.App, cfg *config.Config) {
 	miler := api.Group("/miler")
 	miler.Post("/login", authThrottle, controllers.LoginMiler(cfg))
 	miler.Post("/verify-pin", authThrottle, controllers.VerifyMilerPin(cfg))
-	miler.Post("/reset-pin", authThrottle, controllers.ResetMilerPin)
+	// PIN reset is console-operated, NOT self-service: ResetMilerPin overwrites
+	// the PIN given only a phone number, and phone numbers are the miler login
+	// identifier rather than a secret. Left unauthenticated, two calls
+	// (reset-pin then verify-pin) take over any miler account. Ops resets a
+	// rider's PIN on request instead, so this carries admin/manager/executive
+	// auth even though it sits under the /miler prefix.
+	miler.Post("/reset-pin", authThrottle,
+		middlewares.AuthMiddleware(cfg), middlewares.RoleCheckMiddleware(1, 3, 4),
+		controllers.ResetMilerPin)
 
 	// Authenticated Miler App routes
 	milerAuth := miler.Use(middlewares.AuthMiddleware(cfg), middlewares.RoleCheckMiddleware(5))