更新环境配置，优化数据库和Redis连接设置

- 修改`.env.example`文件，更新数据库和Redis的默认主机地址为`192.168.9.127`
- 在`docker-compose.yml`中移除不必要的卷挂载配置
- 在`go.mod`中添加`github.com/joho/godotenv`依赖以支持环境变量加载
- 更新`README.md`以反映新的数据库和Redis连接信息
- 在`main.go`中加载环境变量以支持动态配置
- 新增缓存存在性检查功能，避免重复预热缓存
- 优化CSV读取逻辑，支持从S3获取数据

internal/config/database.go

@@ -15,12 +15,11 @@ type DatabaseConfig struct {
 }
 
 func loadDatabase(env string) (DatabaseConfig, error) {
-	if os.Getenv("DATABASE_HOST") != "" {
-		return databaseFromEnv()
-	}
-
 	switch env {
 	case "production":
+		if os.Getenv("DATABASE_HOST") != "" {
+			return databaseFromEnv()
+		}
 		return DatabaseConfig{
 			Host:     "database-1.chmuueamo72p.eu-central-1.rds.amazonaws.com",
 			Port:     3306,
@@ -29,12 +28,16 @@ func loadDatabase(env string) (DatabaseConfig, error) {
 			Password: os.Getenv("DATABASE_PASSWORD"),
 		}, nil
 	default:
+		port, err := strconv.Atoi(getEnv("DATABASE_PORT", "3306"))
+		if err != nil {
+			return DatabaseConfig{}, fmt.Errorf("invalid DATABASE_PORT: %w", err)
+		}
 		return DatabaseConfig{
-			Host:     "192.168.9.137",
-			Port:     3306,
-			Name:     "audio",
-			User:     "root",
-			Password: "root123",
+			Host:     getEnv("DATABASE_HOST", "192.168.9.127"),
+			Port:     port,
+			Name:     getEnv("DATABASE_NAME", "audio"),
+			User:     getEnv("DATABASE_USER", "root"),
+			Password: getEnv("DATABASE_PASSWORD", "root123"),
 		}, nil
 	}
 }

internal/config/equalize.go

@@ -3,32 +3,18 @@ package config
 import "os"
 
 type EqualizeConfig struct {
-	APIURL              string
-	MeasurementBasePath string
-	TargetBasePath      string
+	APIURL string
 }
 
 func loadEqualize(env string) EqualizeConfig {
 	if os.Getenv("EQ_API_URL") != "" {
-		return EqualizeConfig{
-			APIURL:              os.Getenv("EQ_API_URL"),
-			MeasurementBasePath: getEnv("MEASUREMENT_BASE_PATH", "/app/measurements"),
-			TargetBasePath:      getEnv("TARGET_BASE_PATH", "/app/targets"),
-		}
+		return EqualizeConfig{APIURL: os.Getenv("EQ_API_URL")}
 	}
 
 	switch env {
 	case "production":
-		return EqualizeConfig{
-			APIURL:              "http://172.31.18.70:8000/equalize",
-			MeasurementBasePath: getEnv("MEASUREMENT_BASE_PATH", "/app/measurements"),
-			TargetBasePath:      getEnv("TARGET_BASE_PATH", "/app/targets"),
-		}
+		return EqualizeConfig{APIURL: "http://172.31.18.70:8000/equalize"}
 	default:
-		return EqualizeConfig{
-			APIURL:              "https://autoeq.app/equalize",
-			MeasurementBasePath: getEnv("MEASUREMENT_BASE_PATH", "/app/measurements"),
-			TargetBasePath:      getEnv("TARGET_BASE_PATH", "/app/targets"),
-		}
+		return EqualizeConfig{APIURL: "https://autoeq.app/equalize"}
 	}
 }

internal/config/redis.go

@@ -14,12 +14,11 @@ type RedisConfig struct {
 }
 
 func loadRedis(env string) RedisConfig {
-	if os.Getenv("REDIS_HOST") != "" {
-		return redisFromEnv()
-	}
-
 	switch env {
 	case "production":
+		if os.Getenv("REDIS_HOST") != "" {
+			return redisFromEnv("16279")
+		}
 		return RedisConfig{
 			Host:     "172.31.38.162",
 			Port:     16279,
@@ -27,17 +26,19 @@ func loadRedis(env string) RedisConfig {
 			Database: 1,
 		}
 	default:
+		port, _ := strconv.Atoi(getEnv("REDIS_PORT", "6379"))
+		db, _ := strconv.Atoi(getEnv("REDIS_DATABASE", "1"))
 		return RedisConfig{
-			Host:     "192.168.9.137",
-			Port:     6379,
-			Password: "",
-			Database: 1,
+			Host:     getEnv("REDIS_HOST", "192.168.9.127"),
+			Port:     port,
+			Password: getEnv("REDIS_PASSWORD", ""),
+			Database: db,
 		}
 	}
 }
 
-func redisFromEnv() RedisConfig {
-	port, _ := strconv.Atoi(getEnv("REDIS_PORT", "16279"))
+func redisFromEnv(defaultPort string) RedisConfig {
+	port, _ := strconv.Atoi(getEnv("REDIS_PORT", defaultPort))
 	db, _ := strconv.Atoi(getEnv("REDIS_DATABASE", "1"))
 
 	return RedisConfig{