all: Add untrusted folders behind feature flag (ref #62) (#7055)

lib/ur/contract/contract.go

@@ -131,6 +131,10 @@ type Report struct {
 		CaseSensitiveFS         int            `json:"caseSensitiveFS,omitempty" since:"3"`
 	} `json:"folderUsesV3,omitempty" since:"3"`
 
+	DeviceUsesV3 struct {
+		Untrusted int `json:"untrusted,omitempty" since:"3"`
+	} `json:"deviceUsesV3,omitempty" since:"3"`
+
 	GUIStats struct {
 		Enabled                   int            `json:"enabled,omitempty" since:"3"`
 		UseTLS                    int            `json:"useTLS,omitempty" since:"3"`

lib/ur/usage_report.go

@@ -275,6 +275,12 @@ func (s *Service) reportData(ctx context.Context, urVersion int, preview bool) (
 		}
 		sort.Ints(report.FolderUsesV3.FsWatcherDelays)
 
+		for _, cfg := range s.cfg.Devices() {
+			if cfg.Untrusted {
+				report.DeviceUsesV3.Untrusted++
+			}
+		}
+
 		guiCfg := s.cfg.GUI()
 		// Anticipate multiple GUI configs in the future, hence store counts.
 		if guiCfg.Enabled {