feat: implement Azure Blob Storage client and refactor configuration structure

internal/app/config/main.go

@@ -6,7 +6,7 @@ import (
 	log "github.com/sirupsen/logrus"
 )
 
-type AzureConfig struct {
+type AzureStorageConfig struct {
 	AccountName string `env:"AZ_ACCOUNT_NAME"`
 	Container   string `env:"AZ_CONTAINER"`
 	AccountKey  string `env:"AZ_ACCOUNT_KEY"`
@@ -17,10 +17,10 @@ type AzureConfig struct {
 }
 
 type appConfig struct {
-	SourceDbUrl string `env:"SOURCE_DB_URL,required"`
-	TargetDbUrl string `env:"TARGET_DB_URL,required"`
-	LogLevel    string `env:"LOG_LEVEL" envDefault:"INFO"`
-	Azure       AzureConfig
+	SourceDbUrl  string `env:"SOURCE_DB_URL,required"`
+	TargetDbUrl  string `env:"TARGET_DB_URL,required"`
+	LogLevel     string `env:"LOG_LEVEL" envDefault:"INFO"`
+	AzureStorage AzureStorageConfig
 }
 
 func getAppConfig() appConfig {