refac: decouple persistence and image storage behind driver registries

internal/domain/image/imageStorage.go

@@ -0,0 +1,27 @@
+package image
+
+import (
+	"errors"
+	"io"
+	"time"
+)
+
+var ErrBlobNotFound = errors.New("stored image content not found")
+
+const PublicPathPrefix = "/static/uploadedImages/"
+
+func PublicPath(storedName string) string {
+	return PublicPathPrefix + storedName
+}
+
+type Blob struct {
+	Content io.ReadCloser
+	Size    int64
+	ModTime time.Time
+}
+
+type Storage interface {
+	Put(contentType string, content io.Reader) (string, error)
+	Open(storedName string) (Blob, error)
+	Delete(storedName string) error
+}