feat(api): master-login stub + WorkspacePrismaPool (Frente E)

- Prisma 7: prisma.config.ts com datasource.url (API correta); schema gerado em CJS
- WorkspacePrismaPool: LRU cache (max 10) de PrismaClient por workspace (ADR 0006)
  PrismaPg adapter + pg.Pool por workspace; getOrCreate/health/onModuleDestroy
- JwtAuthGuard: global APP_GUARD, jose HS256, popula CLS com workspace_id/userId/prisma
  @Public() decorator marca ping/health/dev-auth como rotas abertas
- DevAuthController: POST /auth/dev/token — emite JWT dev (404 em produção)
- AuthTokenResponseSchema + DevTokenRequestSchema em @sar/api-interface
- WorkspacePoolHealthIndicator: health/ready reporta amostra LRU top-3 (nunca O(N))
- .npmrc: hoist @prisma/client-runtime-utils (requerido pelo Prisma 7 isolated mode)

Co-Authored-By: Claude Opus 4.7 <noreply@anthropic.com>

apps/api/src/app/health/health.module.ts

@@ -1,9 +1,12 @@
 import { Module } from '@nestjs/common';
 import { TerminusModule } from '@nestjs/terminus';
+import { WorkspaceModule } from '../workspace/workspace.module';
 import { HealthController } from './health.controller';
+import { WorkspacePoolHealthIndicator } from './workspace-pool.health-indicator';
 
 @Module({
-  imports: [TerminusModule],
+  imports: [TerminusModule, WorkspaceModule],
   controllers: [HealthController],
+  providers: [WorkspacePoolHealthIndicator],
 })
 export class HealthModule {}