refactor: 把common/instants.go里的从Getenv获取的参数，放到init.go的LoadEnv函数里获取

把constant/env.go里的从Getenv获取的参数，放到env.go的InitEnv函数里获取。以避免.env文件配置参数不起作用的情况

common/init.go

@@ -6,6 +6,8 @@ import (
 	"log"
 	"os"
 	"path/filepath"
+	"strconv"
+	"time"
 )
 
 var (
@@ -66,4 +68,31 @@ func LoadEnv() {
 			}
 		}
 	}
+
+	// Initialize variables from constants.go that were using environment variables
+	DebugEnabled = os.Getenv("DEBUG") == "true"
+	MemoryCacheEnabled = os.Getenv("MEMORY_CACHE_ENABLED") == "true"
+	IsMasterNode = os.Getenv("NODE_TYPE") != "slave"
+	
+	// Parse requestInterval and set RequestInterval
+	requestInterval, _ = strconv.Atoi(os.Getenv("POLLING_INTERVAL"))
+	RequestInterval = time.Duration(requestInterval) * time.Second
+	
+	// Initialize variables with GetEnvOrDefault
+	SyncFrequency = GetEnvOrDefault("SYNC_FREQUENCY", 60)
+	BatchUpdateInterval = GetEnvOrDefault("BATCH_UPDATE_INTERVAL", 5)
+	RelayTimeout = GetEnvOrDefault("RELAY_TIMEOUT", 0)
+	
+	// Initialize string variables with GetEnvOrDefaultString
+	GeminiSafetySetting = GetEnvOrDefaultString("GEMINI_SAFETY_SETTING", "BLOCK_NONE")
+	CohereSafetySetting = GetEnvOrDefaultString("COHERE_SAFETY_SETTING", "NONE")
+	
+	// Initialize rate limit variables
+	GlobalApiRateLimitEnable = GetEnvOrDefaultBool("GLOBAL_API_RATE_LIMIT_ENABLE", true)
+	GlobalApiRateLimitNum = GetEnvOrDefault("GLOBAL_API_RATE_LIMIT", 180)
+	GlobalApiRateLimitDuration = int64(GetEnvOrDefault("GLOBAL_API_RATE_LIMIT_DURATION", 180))
+	
+	GlobalWebRateLimitEnable = GetEnvOrDefaultBool("GLOBAL_WEB_RATE_LIMIT_ENABLE", true)
+	GlobalWebRateLimitNum = GetEnvOrDefault("GLOBAL_WEB_RATE_LIMIT", 60)
+	GlobalWebRateLimitDuration = int64(GetEnvOrDefault("GLOBAL_WEB_RATE_LIMIT_DURATION", 180))
 }