chore: Rename agent statistics server to http api server (#5961)

agent/agent.go

@@ -526,23 +526,23 @@ func (a *agent) createTailnet(ctx context.Context, derpMap *tailcfg.DERPMap) (_
 		return nil, err
 	}
 
-	statisticsListener, err := network.Listen("tcp", ":"+strconv.Itoa(codersdk.WorkspaceAgentStatisticsPort))
+	apiListener, err := network.Listen("tcp", ":"+strconv.Itoa(codersdk.WorkspaceAgentHTTPAPIServerPort))
 	if err != nil {
-		return nil, xerrors.Errorf("listen for statistics: %w", err)
+		return nil, xerrors.Errorf("api listener: %w", err)
 	}
 	defer func() {
 		if err != nil {
-			_ = statisticsListener.Close()
+			_ = apiListener.Close()
 		}
 	}()
 	if err = a.trackConnGoroutine(func() {
-		defer statisticsListener.Close()
+		defer apiListener.Close()
 		server := &http.Server{
-			Handler:           a.statisticsHandler(),
+			Handler:           a.apiHandler(),
 			ReadTimeout:       20 * time.Second,
 			ReadHeaderTimeout: 20 * time.Second,
 			WriteTimeout:      20 * time.Second,
-			ErrorLog:          slog.Stdlib(ctx, a.logger.Named("statistics_http_server"), slog.LevelInfo),
+			ErrorLog:          slog.Stdlib(ctx, a.logger.Named("http_api_server"), slog.LevelInfo),
 		}
 		go func() {
 			select {
@@ -552,9 +552,9 @@ func (a *agent) createTailnet(ctx context.Context, derpMap *tailcfg.DERPMap) (_
 			_ = server.Close()
 		}()
 
-		err := server.Serve(statisticsListener)
+		err := server.Serve(apiListener)
 		if err != nil && !xerrors.Is(err, http.ErrServerClosed) && !strings.Contains(err.Error(), "use of closed network connection") {
-			a.logger.Critical(ctx, "serve statistics HTTP server", slog.Error(err))
+			a.logger.Critical(ctx, "serve HTTP API server", slog.Error(err))
 		}
 	}); err != nil {
 		return nil, err

agent/api.go

@@ -11,7 +11,7 @@ import (
 	"github.com/coder/coder/codersdk"
 )
 
-func (*agent) statisticsHandler() http.Handler {
+func (*agent) apiHandler() http.Handler {
 	r := chi.NewRouter()
 	r.Get("/", func(rw http.ResponseWriter, r *http.Request) {
 		httpapi.Write(r.Context(), rw, http.StatusOK, codersdk.Response{