Feature: Add per-runner “Disable/Pause” (#36776)

This PR adds per-runner disable/enable support for Gitea Actions so a
registered runner can be paused from picking up new jobs without
unregistering.

Disabled runners stay registered and online but are excluded from new
task assignment; running tasks are allowed to finish. Re-enabling
restores pickup, and runner list/get responses now expose disabled
state.

Also added an endpoint for testing
http://localhost:3000/devtest/runner-edit/enable

<img width="1509" height="701" alt="Bildschirmfoto 2026-02-27 um 22 13
24"
src="https://github.com/user-attachments/assets/5328eda9-e59c-46b6-b398-f436e50ee3da"
/>


Fixes: https://github.com/go-gitea/gitea/issues/36767

tests/integration/actions_runner_test.go

@@ -19,6 +19,7 @@ import (
 	"code.gitea.io/actions-proto-go/runner/v1/runnerv1connect"
 	"connectrpc.com/connect"
 	"github.com/stretchr/testify/assert"
+	"github.com/stretchr/testify/require"
 	"google.golang.org/protobuf/types/known/timestamppb"
 )
 
@@ -113,12 +114,8 @@ func (r *mockRunner) tryFetchTask(t *testing.T, timeout ...time.Duration) *runne
 	ddl := time.Now().Add(fetchTimeout)
 	var task *runnerv1.Task
 	for time.Now().Before(ddl) {
-		resp, err := r.client.runnerServiceClient.FetchTask(t.Context(), connect.NewRequest(&runnerv1.FetchTaskRequest{
-			TasksVersion: 0,
-		}))
-		assert.NoError(t, err)
-		if resp.Msg.Task != nil {
-			task = resp.Msg.Task
+		task, _ = r.fetchTaskOnce(t, 0)
+		if task != nil {
 			break
 		}
 		time.Sleep(200 * time.Millisecond)
@@ -127,6 +124,17 @@ func (r *mockRunner) tryFetchTask(t *testing.T, timeout ...time.Duration) *runne
 	return task
 }
 
+// fetchTaskOnce performs a single FetchTask request with the given TasksVersion
+// and returns the task (if any) and the TasksVersion from the response.
+// Used to verify the production path where the runner sends the current version.
+func (r *mockRunner) fetchTaskOnce(t *testing.T, tasksVersion int64) (*runnerv1.Task, int64) {
+	resp, err := r.client.runnerServiceClient.FetchTask(t.Context(), connect.NewRequest(&runnerv1.FetchTaskRequest{
+		TasksVersion: tasksVersion,
+	}))
+	require.NoError(t, err)
+	return resp.Msg.Task, resp.Msg.TasksVersion
+}
+
 type mockTaskOutcome struct {
 	result  runnerv1.Result
 	outputs map[string]string