fix(mining-*): add parent .env path for shared config

All mining services need to read shared environment variables
(JWT_SECRET, DATABASE_URL, etc.) from backend/services/.env

Co-Authored-By: Claude Opus 4.5 <noreply@anthropic.com>

backend/services/mining-admin-service/src/app.module.ts

@@ -12,7 +12,11 @@ import { AdminAuthGuard } from './shared/guards/admin-auth.guard';
   imports: [
     ConfigModule.forRoot({
       isGlobal: true,
-      envFilePath: [`.env.${process.env.NODE_ENV || 'development'}`, '.env'],
+      envFilePath: [
+        `.env.${process.env.NODE_ENV || 'development'}`,
+        '.env',
+        '../.env', // 父目录共享 .env
+      ],
     }),
     InfrastructureModule,
     ApplicationModule,

backend/services/mining-service/src/app.module.ts

@@ -16,6 +16,7 @@ import { JwtAuthGuard } from './shared/guards/jwt-auth.guard';
       envFilePath: [
         `.env.${process.env.NODE_ENV || 'development'}`,
         '.env',
+        '../.env', // 父目录共享 .env
       ],
       ignoreEnvFile: false,
     }),

backend/services/mining-wallet-service/src/app.module.ts

@@ -16,6 +16,7 @@ import { JwtAuthGuard } from './shared/guards/jwt-auth.guard';
       envFilePath: [
         `.env.${process.env.NODE_ENV || 'development'}`,
         '.env',
+        '../.env', // 父目录共享 .env
       ],
       ignoreEnvFile: false,
     }),