fix: correct organize media type classification

internal/service/manual_scrape.go

@@ -450,6 +450,9 @@ func mergeManualRequestIntoMatch(match *Match, req ManualScrapeRequest) *Match {
 	if req.Title != "" {
 		match.Title = req.Title
 	}
+	if mediaType := normalizeOrganizeMediaType(req.MediaType); mediaType != "" {
+		match.MediaType = mediaType
+	}
 	if req.OriginalName != "" {
 		match.OriginalName = req.OriginalName
 	}