feat(hometitle): add Backend Router — HomeTitle (Property Monitoring)

- Add hometitle schema (Valibot input schemas)
- Add change detector (fuzzy matching, severity, change detection)
- Add scanner module (geocoding, county records placeholder)
- Add hometitle service (property CRUD, scan, alert pipeline)
- Add hometitle router (7 tRPC procedures)
- Wire into api root
- Add alert type 'property_change' to enum
- Write unit tests (10 tests, all passing)

web/src/server/api/routers/hometitle.ts

@@ -0,0 +1,53 @@
+import { wrap } from "@typeschema/valibot";
+import { createTRPCRouter, protectedProcedure } from "../utils";
+import {
+  AddPropertySchema,
+  RemovePropertySchema,
+  GetSnapshotsSchema,
+  GetChangesSchema,
+  RunScanSchema,
+} from "../schemas/hometitle";
+import * as hometitleService from "~/server/services/hometitle.service";
+
+export const hometitleRouter = createTRPCRouter({
+  getProperties: protectedProcedure.query(async ({ ctx }) => {
+    return hometitleService.getProperties(ctx.user.id);
+  }),
+
+  addProperty: protectedProcedure
+    .input(wrap(AddPropertySchema))
+    .mutation(async ({ ctx, input }) => {
+      return hometitleService.addProperty(ctx.user.id, input.address, input.parcelId, input.ownerName);
+    }),
+
+  removeProperty: protectedProcedure
+    .input(wrap(RemovePropertySchema))
+    .mutation(async ({ ctx, input }) => {
+      return hometitleService.removeProperty(ctx.user.id, input.propertyId);
+    }),
+
+  getSnapshots: protectedProcedure
+    .input(wrap(GetSnapshotsSchema))
+    .query(async ({ ctx, input }) => {
+      return hometitleService.getSnapshots(ctx.user.id, input.propertyId);
+    }),
+
+  getChanges: protectedProcedure
+    .input(wrap(GetChangesSchema))
+    .query(async ({ ctx, input }) => {
+      return hometitleService.getChanges(ctx.user.id, input.propertyId, {
+        severity: input.severity,
+        changeType: input.changeType,
+      });
+    }),
+
+  runScan: protectedProcedure
+    .input(wrap(RunScanSchema))
+    .mutation(async ({ ctx }) => {
+      return hometitleService.runScan(ctx.user.id);
+    }),
+
+  getAlerts: protectedProcedure.query(async ({ ctx }) => {
+    return hometitleService.getAlerts(ctx.user.id);
+  }),
+});