Check committed file sizes

internal/validation/diagnostic.go

@@ -21,6 +21,8 @@ const (
 	WorkspaceFiles Check = "workspace-files"
 	// LocalReplacements identifies filesystem replacements in committed modules.
 	LocalReplacements Check = "local-replacements"
+	// FileSize identifies committed blobs that exceed a selected size limit.
+	FileSize Check = "file-size"
 )
 
 // Finding describes a validation observation at an optional source location.