fix(server): reconcile auth split with main

server/apps/api/src/app.ts

@@ -1,6 +1,6 @@
 import type { Database } from './libs/db'
 import type { Env } from './libs/env'
-import type { ApiOtelInstance } from './otel'
+import type { OtelInstance } from './otel'
 import type { StreamingTtsVoiceType } from './routes/audio-speech-ws/session'
 import type { ConfigKVService } from './services/adapters/config-kv'
 import type { AdminFluxGrantsService } from './services/domain/admin/flux-grants'
@@ -110,7 +110,7 @@ interface AppDeps {
   envelopeCrypto: EnvelopeCrypto
   redis: Redis
   env: Env
-  otel: ApiOtelInstance | null
+  otel: OtelInstance | null
   userDeletionService: UserDeletionService
   llmRouter: LlmRouterService
   providerCatalogService: ProviderCatalogService
@@ -119,7 +119,7 @@ interface AppDeps {
 export async function buildApp(deps: AppDeps) {
   const logger = useLogger('app').useGlobalConfig()
   const userMetricsRecorder = deps.otel
-    ? registerUserMetricsSnapshotGauges(deps.otel.user)
+    ? registerUserMetricsSnapshotGauges(deps.otel.auth)
     : createDiscardingUserMetricsSnapshotRecorder()
 
   const app = new Hono<HonoEnv>()

server/apps/auth/src/tests/mock-db.ts

@@ -0,0 +1,26 @@
+import type { pushSchema as PushSchema } from 'drizzle-kit/api'
+
+import { createRequire } from 'node:module'
+
+import { PGlite } from '@electric-sql/pglite'
+import { drizzle } from 'drizzle-orm/pglite'
+
+import * as authSchema from '@proj-airi/auth-shared'
+
+/** Creates an in-memory database with the standalone Auth service schema. */
+export async function createTestDatabase() {
+  const client = new PGlite()
+  const database = drizzle(client)
+
+  // NOTICE:
+  // drizzle-kit's `api` entry is CommonJS while this Vitest project is ESM.
+  // Loading it via createRequire preserves its public runtime boundary.
+  // Source/context: server/apps/api/src/libs/mock-db.ts uses the same drizzle-kit API.
+  // Removal condition: drizzle-kit exposes a working ESM API entry.
+  const require = createRequire(import.meta.url)
+  const { pushSchema } = require('drizzle-kit/api') as { pushSchema: typeof PushSchema }
+  const { apply } = await pushSchema(authSchema, database)
+  await apply()
+
+  return database
+}