FRE-4533: Merge apps/{api,web,mobile} and shared-db into ShieldAI repo

- Copy apps/api (Fastify server with spamshield/voiceprint/darkwatch services)
- Copy apps/web (SolidJS web app)
- Copy apps/mobile (SolidJS mobile app)
- Copy packages/shared-db (Prisma schema/models)
- Add apps/* to pnpm-workspace.yaml

packages/shared-db/drizzle.config.ts

@@ -0,0 +1,12 @@
+import { defineConfig } from 'drizzle-kit';
+
+export default defineConfig({
+  schema: './prisma/schema.prisma',
+  out: './migrations',
+  dialect: 'postgresql',
+  dbCredentials: {
+    url: process.env.DATABASE_URL!,
+  },
+  verbose: true,
+  strict: true,
+});