feat(backend): add WeatherService

Manage per-user WeatherSource instances via FeedSourceProvider,
following the same pattern as LocationService. Wire into
FeedEngineService so weather data is included in the feed.

Co-authored-by: Ona <no-reply@ona.com>

apps/aris-backend/src/trpc/router.ts

@@ -1,9 +1,11 @@
 import { initTRPC, TRPCError } from "@trpc/server"
 
-import { createLocationRouter } from "../location/router.ts"
 import type { LocationService } from "../location/service.ts"
+import type { WeatherService } from "../weather/service.ts"
 import type { Context } from "./context.ts"
 
+import { createLocationRouter } from "../location/router.ts"
+
 interface AuthedContext {
 	user: NonNullable<Context["user"]>
 	session: NonNullable<Context["session"]>
@@ -34,6 +36,7 @@ export type TRPC = ReturnType<typeof createTRPC>
 
 export interface TRPCRouterDeps {
 	locationService: LocationService
+	weatherService: WeatherService
 }
 
 export function createTRPCRouter({ locationService }: TRPCRouterDeps) {