FRE-4529: Transfer ShieldAI code from FrenoCorp repo

Transferred ShieldAI-related files mistakenly placed in ~/code/FrenoCorp:
- Services: spamshield (feature-flags, audit-logger, error-handler), voiceprint (config, service, feature-flags), darkwatch (pipeline, scan, scheduler, watchlist, webhook)
- Packages: shared-analytics, shared-auth, shared-ui, shared-utils (new); shared-billing, jobs supplemented with unique FC files
- Server: alerts (FC version newer), routes (spamshield, darkwatch, voiceprint)
- Config: turbo.json, tsconfig.base.json, vite/vitest configs, drizzle, Dockerfile
- VoicePrint ML service
- Examples

Pending: apps/{api,web,mobile}/ structured merge, shared-db/db mapping

Co-Authored-By: Paperclip <noreply@paperclip.ing>

turbo.json

@@ -1,25 +1,30 @@
 {
   "$schema": "https://turbo.build/schema.json",
+  "globalDependencies": ["**/.env.*local"],
+  "globalEnv": ["NODE_ENV", "DATABASE_URL", "REDIS_URL"],
   "tasks": {
     "build": {
       "dependsOn": ["^build"],
-      "outputs": ["dist/**"]
+      "outputs": ["dist/**", ".next/**", "!.next/cache/**"]
     },
     "dev": {
       "cache": false,
       "persistent": true
     },
     "test": {
-      "dependsOn": ["build"],
-      "inputs": ["src/**/*.ts", "test/**/*.ts"]
+      "dependsOn": ["^build"],
+      "outputs": ["coverage/**"]
     },
     "lint": {
-      "inputs": ["src/**/*.ts"]
+      "outputs": []
     },
-    "db:migrate": {
+    "db:generate": {
       "cache": false
     },
-    "db:seed": {
+    "db:push": {
+      "cache": false
+    },
+    "db:migrate": {
       "cache": false
     }
   }