feat: 重命名项目为 PolyHermes 并添加下单签名前日志

- 将所有 polymarket-bot 相关名称改为 PolyHermes
  - 容器名称: polyhermes, polyhermes-mysql, polyhermes-backend
  - 数据库名称: polyhermes
  - 应用名称: polyhermes-backend, polyhermes-frontend
  - 网络名称: polyhermes-network
  - 更新所有配置文件和文档

- 在 OrderSigningService 中添加下单签名前的详细日志输出
  - 输出订单方向、价格、数量、地址、金额等所有参数
  - 便于调试和排查下单问题

backend/src/main/kotlin/com/wrbug/polymarketbot/controller/HealthController.kt

@@ -19,7 +19,7 @@ class HealthController {
         return ResponseEntity.ok(mapOf(
             "status" to "UP",
             "timestamp" to System.currentTimeMillis(),
-            "service" to "polymarket-bot-backend"
+            "service" to "polyhermes-backend"
         ))
     }
 }

backend/src/main/kotlin/com/wrbug/polymarketbot/service/OrderSigningService.kt

@@ -168,6 +168,26 @@ class OrderSigningService {
             // 5. 确保 maker 地址也是小写格式
             val makerAddressLower = makerAddress.lowercase()
             
+            // 打印签名前的订单参数
+            logger.info("========== 订单签名前参数 ==========")
+            logger.info("订单方向: $side")
+            logger.info("价格: $price")
+            logger.info("数量: $size")
+            logger.info("Token ID: $tokenId")
+            logger.info("Maker 地址: $makerAddressLower")
+            logger.info("Signer 地址: $signerAddress")
+            logger.info("Taker 地址: $taker")
+            logger.info("Maker Amount (wei): ${amounts.makerAmount}")
+            logger.info("Taker Amount (wei): ${amounts.takerAmount}")
+            logger.info("Salt: $salt")
+            logger.info("Expiration: $expiration")
+            logger.info("Nonce: $nonce")
+            logger.info("Fee Rate BPS: $feeRateBps")
+            logger.info("Signature Type: $signatureType")
+            logger.info("Exchange Contract: $EXCHANGE_CONTRACT")
+            logger.info("Chain ID: $CHAIN_ID")
+            logger.info("====================================")
+            
             // 6. 构建订单数据并签名
             val signature = signOrder(
                 privateKey = privateKey,