feat(server): add immich.users.total metric (#21780)

* Add immich.users.total metric

* Fix tests & one lint error

* Lint

* Fix SQL Schema checks

* Fix nit

* Use workers argument in OnEvent hook and remove condition from method body

server/test/medium.factory.ts

@@ -39,6 +39,7 @@ import { StorageRepository } from 'src/repositories/storage.repository';
 import { SyncCheckpointRepository } from 'src/repositories/sync-checkpoint.repository';
 import { SyncRepository } from 'src/repositories/sync.repository';
 import { SystemMetadataRepository } from 'src/repositories/system-metadata.repository';
+import { TelemetryRepository } from 'src/repositories/telemetry.repository';
 import { UserRepository } from 'src/repositories/user.repository';
 import { VersionHistoryRepository } from 'src/repositories/version-history.repository';
 import { DB } from 'src/schema';
@@ -54,6 +55,7 @@ import { StackTable } from 'src/schema/tables/stack.table';
 import { UserTable } from 'src/schema/tables/user.table';
 import { BASE_SERVICE_DEPENDENCIES, BaseService } from 'src/services/base.service';
 import { SyncService } from 'src/services/sync.service';
+import { newTelemetryRepositoryMock } from 'test/repositories/telemetry.repository.mock';
 import { factory, newDate, newEmbedding, newUuid } from 'test/small.factory';
 import { automock, wait } from 'test/utils';
 import { Mocked } from 'vitest';
@@ -347,6 +349,10 @@ const newMockRepository = <T>(key: ClassConstructor<T>) => {
       return automock(key);
     }
 
+    case TelemetryRepository: {
+      return newTelemetryRepositoryMock();
+    }
+
     case DatabaseRepository: {
       return automock(DatabaseRepository, {
         args: [undefined, { setContext: () => {} }, { getEnv: () => ({ database: { vectorExtension: '' } }) }],