chore: planning docs + backend/frontend scaffold + MVP Prisma schema

- CLAUDE.md, ARCHITECTURE.md, TASKS.md per Lastenheft-Vorgabe
- ApiCore-Backend: NestJS scaffold, Prisma 7 (DATABASE_URL via prisma.config.ts)
- ApiCore-Frontend: Next.js App Router scaffold (TS, Tailwind, ESLint)
- prisma/schema.prisma: alle MVP-Entitaeten aus Abschnitt 13/4.2-4.22/26,
  validiert und Client generiert

Grundgeruest (TASKS.md #0) noch nicht vollstaendig: shadcn/ui, TanStack Query,
PWA-Manifest, deploy/k8s/, Dockerfiles fehlen noch.

ApiCore-Backend/skills-lock.json

@@ -0,0 +1,59 @@
+{
+  "version": 1,
+  "skills": {
+    "prisma-cli": {
+      "source": "prisma/skills",
+      "sourceType": "github",
+      "skillPath": "prisma-cli/SKILL.md",
+      "computedHash": "b92e55aef78f6796d81433c44738a6733211a04c16e65cbad6d42c5f71092aab"
+    },
+    "prisma-client-api": {
+      "source": "prisma/skills",
+      "sourceType": "github",
+      "skillPath": "prisma-client-api/SKILL.md",
+      "computedHash": "5dcc0793337151efa73a444e5adbc7e1c24180778e83b4fe94c9109c391bd333"
+    },
+    "prisma-compute": {
+      "source": "prisma/skills",
+      "sourceType": "github",
+      "skillPath": "prisma-compute/SKILL.md",
+      "computedHash": "fbbdcf3e01ed876113d18804d38d17359d9f7ba7a4bd353193673d5924f19818"
+    },
+    "prisma-database-setup": {
+      "source": "prisma/skills",
+      "sourceType": "github",
+      "skillPath": "prisma-database-setup/SKILL.md",
+      "computedHash": "0911d9454bd48df3badd23a50fd90a280eabb15dcbd472c14e7b729075dadefb"
+    },
+    "prisma-driver-adapter-implementation": {
+      "source": "prisma/skills",
+      "sourceType": "github",
+      "skillPath": "prisma-driver-adapter-implementation/SKILL.md",
+      "computedHash": "07484627aea6cce4d0f94b4090ff9acc0caa7e104f9988b95abecf80132f4103"
+    },
+    "prisma-mongodb-upgrade": {
+      "source": "prisma/skills",
+      "sourceType": "github",
+      "skillPath": "prisma-mongodb-upgrade/SKILL.md",
+      "computedHash": "f9ba440e88ca4cec9801d04762296e29e99ca08cb8a8156e4f783ecf90279c8f"
+    },
+    "prisma-postgres": {
+      "source": "prisma/skills",
+      "sourceType": "github",
+      "skillPath": "prisma-postgres/SKILL.md",
+      "computedHash": "d669fbd0d8017d16c967f18b20e1c1345cd4a2a0076d762459bfef79f551f655"
+    },
+    "prisma-postgres-setup": {
+      "source": "prisma/skills",
+      "sourceType": "github",
+      "skillPath": "prisma-postgres-setup/SKILL.md",
+      "computedHash": "c89d3aa91285d8e4964fcaa5238c99a3d3c20b617e032e731cf632330a85a5a6"
+    },
+    "prisma-upgrade-v7": {
+      "source": "prisma/skills",
+      "sourceType": "github",
+      "skillPath": "prisma-upgrade-v7/SKILL.md",
+      "computedHash": "dcc6c71adca6b22f37c5bda5ac7fd63c3bb59495596a22e06a29c7c85371558f"
+    }
+  }
+}