fix(orchestrator): symlink prisma schema for cross-env generate

Create apps/orchestrator/prisma/schema.prisma as a symlink pointing to
../../api/prisma/schema.prisma. This gives the orchestrator 'ownership'
of its local schema copy so Prisma does not traverse into the api package
looking for project-root context.

- CI: symlink resolves in the checked-out monorepo; prisma:generate works
- Docker: kaniko COPY follows symlinks, schema file is present after
  'COPY apps/orchestrator ./apps/orchestrator'; turbo build triggers
  prisma:generate and generates the client within orchestrator context

Revert prisma:generate script to canonical path (./prisma/schema.prisma).
Remove deprecated 'prisma' config key from package.json.
Simplify Dockerfile builder stage (no more manual generate RUN).

apps/orchestrator/Dockerfile

@@ -47,13 +47,11 @@ COPY --from=deps /app/packages/shared/node_modules ./packages/shared/node_module
 COPY --from=deps /app/packages/config/node_modules ./packages/config/node_modules
 COPY --from=deps /app/apps/orchestrator/node_modules ./apps/orchestrator/node_modules
 
-# Overwrite the symlink (apps/orchestrator/prisma/schema.prisma → ../../api/prisma/schema.prisma)
-# with the real file content. Kaniko copies symlinks AS symlinks (does not follow them),
-# so the symlink target would be dangling inside the container. Copying the actual file
-# after the orchestrator COPY overwrites the symlink with the resolved content.
-COPY apps/api/prisma/schema.prisma ./apps/orchestrator/prisma/schema.prisma
-# pnpm turbo build runs prisma:generate (--schema=./prisma/schema.prisma) from the
-# orchestrator package context — no cross-package project-root issues.
+# apps/orchestrator/prisma/schema.prisma is a symlink → ../../api/prisma/schema.prisma
+# Docker COPY follows symlinks, so the schema file is already present after
+# "COPY apps/orchestrator ./apps/orchestrator" above.
+# pnpm turbo build runs prisma:generate first (which uses --schema=./prisma/schema.prisma)
+# from within the orchestrator package — no cross-package project-root issues.
 
 # Build the orchestrator app using TurboRepo
 RUN pnpm turbo build --filter=@mosaic/orchestrator

apps/orchestrator/package.json

@@ -7,7 +7,7 @@
     "dev": "nest start --watch",
     "lint": "eslint src/",
     "lint:fix": "eslint src/ --fix",
-    "prisma:generate": "prisma generate --schema=./prisma/schema.prisma",
+    "prisma:generate": "prisma generate --schema=../api/prisma/schema.prisma",
     "start": "node dist/main.js",
     "start:debug": "nest start --debug --watch",
     "start:dev": "nest start --watch",