fix(blockchain): 修复health check路径不匹配并配置C2C Bot热钱包

- app.config.ts: 添加apiPrefix读取API_PREFIX环境变量
- docker-compose: health check从api/v2改为api/v1（与trading-service一致）
- docker-compose: 配置HOT_WALLET默认值，解决"区块链服务不可用"和钱包地址不显示

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

backend/services/docker-compose.2.0.yml

@@ -295,8 +295,8 @@ services:
       BSC_CHAIN_ID: ${BSC_CHAIN_ID:-56}
       BSC_USDT_CONTRACT: ${BSC_USDT_CONTRACT:-0x55d398326f99059fF775485246999027B3197955}
       # C2C Bot 热钱包 (MPC)
-      HOT_WALLET_USERNAME: ${HOT_WALLET_USERNAME:-}
-      HOT_WALLET_ADDRESS: ${HOT_WALLET_ADDRESS:-}
+      HOT_WALLET_USERNAME: ${HOT_WALLET_USERNAME:-wallet-29b09647}
+      HOT_WALLET_ADDRESS: ${HOT_WALLET_ADDRESS:-0x30da9Eb4C49914fDb9d711cE26AB446d68fE4Bc4}
       # eUSDT (积分股) 做市商钱包 (MPC)
       EUSDT_MARKET_MAKER_USERNAME: ${EUSDT_MARKET_MAKER_USERNAME:-}
       EUSDT_MARKET_MAKER_ADDRESS: ${EUSDT_MARKET_MAKER_ADDRESS:-}
@@ -309,7 +309,7 @@ services:
     ports:
       - "3026:3026"
     healthcheck:
-      test: ["CMD", "curl", "-f", "http://localhost:3026/api/v2/health"]
+      test: ["CMD", "curl", "-f", "http://localhost:3026/api/v1/health"]
       interval: 30s
       timeout: 10s
       retries: 3

backend/services/mining-blockchain-service/src/config/app.config.ts

@@ -4,4 +4,5 @@ export default registerAs('app', () => ({
   nodeEnv: process.env.NODE_ENV || 'development',
   port: parseInt(process.env.PORT || '3012', 10),
   serviceName: process.env.SERVICE_NAME || 'blockchain-service',
+  apiPrefix: process.env.API_PREFIX || 'api/v1',
 }));