feat(service): NestJS kernel skeleton + 10-table kernel schema (P1.1+1.2)

Reuses support-service bootstrap/health/prisma patterns. Kernel-only Prisma
schema (scope/source_handle/actor/channel/thread/participant/interaction/
message_part/outbox/processed_event) with orgId/appId NOT NULL and
@@unique([scopeId, idempotencyKey]). Health verified: {status:ok,db:true}.

Co-Authored-By: Claude Opus 4.8 (1M context) <noreply@anthropic.com>

packages/iios-service/package.json

@@ -0,0 +1,36 @@
+{
+  "name": "@insignia/iios-service",
+  "version": "0.0.0",
+  "private": true,
+  "scripts": {
+    "build": "nest build",
+    "start": "nest start",
+    "dev": "nest start --watch",
+    "typecheck": "tsc -p tsconfig.json --noEmit",
+    "prisma:generate": "prisma generate",
+    "prisma:migrate": "prisma migrate dev",
+    "prisma:studio": "prisma studio"
+  },
+  "dependencies": {
+    "@insignia/iios-contracts": "workspace:*",
+    "@nestjs/common": "^11.1.27",
+    "@nestjs/core": "^11.1.27",
+    "@nestjs/platform-express": "^11.1.27",
+    "@prisma/client": "^6.2.1",
+    "class-transformer": "^0.5.1",
+    "class-validator": "^0.15.1",
+    "jsonwebtoken": "^9.0.3",
+    "reflect-metadata": "^0.2.2",
+    "rxjs": "^7.8.2"
+  },
+  "devDependencies": {
+    "@insignia/iios-testkit": "workspace:*",
+    "@nestjs/cli": "^11.0.23",
+    "@nestjs/schematics": "^11.1.0",
+    "@types/express": "^5.0.6",
+    "@types/jsonwebtoken": "^9.0.10",
+    "@types/node": "^26.0.1",
+    "prisma": "^6.2.1",
+    "typescript": "^5.7.3"
+  }
+}