Federation: return useful statistic information for nodeinfo (#19561)

Add statistic information for total user count, active user count, issue count and comment count for `/nodeinfo`

modules/context/api.go

@@ -14,6 +14,7 @@ import (
 
 	"code.gitea.io/gitea/models/auth"
 	repo_model "code.gitea.io/gitea/models/repo"
+	"code.gitea.io/gitea/modules/cache"
 	"code.gitea.io/gitea/modules/git"
 	"code.gitea.io/gitea/modules/log"
 	"code.gitea.io/gitea/modules/setting"
@@ -247,6 +248,7 @@ func APIContexter() func(http.Handler) http.Handler {
 					Resp:   NewResponse(w),
 					Data:   map[string]interface{}{},
 					Locale: locale,
+					Cache:  cache.GetCache(),
 					Repo: &Repository{
 						PullRequest: &PullRequest{},
 					},

modules/setting/federation.go

@@ -9,9 +9,11 @@ import "code.gitea.io/gitea/modules/log"
 // Federation settings
 var (
 	Federation = struct {
-		Enabled bool
+		Enabled             bool
+		ShareUserStatistics bool
 	}{
-		Enabled: true,
+		Enabled:             true,
+		ShareUserStatistics: true,
 	}
 )