refactor(modules): mark DatabaseModule and CryptoModule as global and remove redundant imports

Optimize module imports by marking `DatabaseModule` and `CryptoModule` as global. Remove explicit imports from other modules to reduce duplication and improve maintainability. Update environment variable limits for image and GIF sizes in production.

backend/src/api-keys/api-keys.module.ts

@@ -1,13 +1,11 @@
 import { forwardRef, Module } from "@nestjs/common";
 import { AuthModule } from "../auth/auth.module";
-import { CryptoModule } from "../crypto/crypto.module";
-import { DatabaseModule } from "../database/database.module";
 import { ApiKeysController } from "./api-keys.controller";
 import { ApiKeysService } from "./api-keys.service";
 import { ApiKeysRepository } from "./repositories/api-keys.repository";
 
 @Module({
-	imports: [DatabaseModule, forwardRef(() => AuthModule), CryptoModule],
+	imports: [forwardRef(() => AuthModule)],
 	controllers: [ApiKeysController],
 	providers: [ApiKeysService, ApiKeysRepository],
 	exports: [ApiKeysService, ApiKeysRepository],