feat: Implement direct upload functionality for desktop client releases

- Added new endpoints for initiating and completing direct uploads of desktop client packages.
- Introduced request and response structures for direct upload operations.
- Enhanced the upload process to support SHA256 and Content-MD5 validation.
- Updated the frontend to reflect changes in upload button states and progress indicators.
- Modified object storage clients to support presigned PUT URLs with content type and MD5 headers.
- Added tests for direct upload functionality and ensured existing upload processes remain intact.

server/internal/shared/objectstorage/client.go

@@ -5,6 +5,7 @@ import (
 	"errors"
 	"fmt"
 	"io"
+	"net/http"
 	"strings"
 	"time"
 
@@ -32,6 +33,16 @@ type ReaderClient interface {
 	PutReader(ctx context.Context, objectKey string, reader io.Reader, size int64, contentType string) error
 }
 
+type PresignedPutResult struct {
+	URL       string
+	Headers   http.Header
+	ExpiresAt time.Time
+}
+
+type PresignedPutClient interface {
+	PresignedPutURL(ctx context.Context, objectKey string, contentType string, contentMD5Base64 string, ttl time.Duration) (*PresignedPutResult, error)
+}
+
 type ManagementClient interface {
 	Client
 	List(ctx context.Context, in ListInput) (*ListResult, error)