Add hometitle service: fuzzy matching engine and change detector FRE-5351

- matcher.service.ts: name/address normalization, Levenshtein distance,
  geocoding proximity, confidence scoring (0.0-1.0)
- change-detector.ts: PropertySnapshot diff engine, severity scoring
  (minor/moderate/major), configurable thresholds, alert triggering
- 57 unit tests with 98%+ coverage across all thresholds

services/hometitle/package.json

@@ -0,0 +1,22 @@
+{
+  "name": "@shieldai/hometitle",
+  "version": "0.1.0",
+  "main": "./dist/index.js",
+  "types": "./dist/index.js",
+  "scripts": {
+    "build": "tsc",
+    "test": "vitest run",
+    "test:coverage": "vitest run --coverage",
+    "lint": "eslint src/"
+  },
+  "dependencies": {
+    "@shieldai/types": "workspace:*"
+  },
+  "devDependencies": {
+    "vitest": "^4.1.5",
+    "@vitest/coverage-v8": "^4.1.5"
+  },
+  "exports": {
+    ".": "./src/index.ts"
+  }
+}