Init storage engine (#13707)

### What problem does this PR solve?

1. Init Minio / S3 / OSS
2. Fix minio / s3 / oss config

### Type of change

- [x] New Feature (non-breaking change which adds functionality)

---------

Signed-off-by: Jin Hai <haijin.chn@gmail.com>

cmd/server_main.go

@@ -10,6 +10,7 @@ import (
 	"ragflow/internal/common"
 	"ragflow/internal/server"
 	"ragflow/internal/server/local"
+	"ragflow/internal/storage"
 	"ragflow/internal/utility"
 	"strings"
 	"syscall"
@@ -118,6 +119,10 @@ func main() {
 	}
 	defer cache.Close()
 
+	if err := storage.InitStorageFactory(); err != nil {
+		logger.Fatal("Failed to initialize storage factory", zap.Error(err))
+	}
+
 	// Initialize server variables (runtime variables that can change during operation)
 	// This must be done after Cache is initialized
 	if err := server.InitVariables(cache.Get()); err != nil {