Batch-load related data in actions run, job, and task API endpoints (#37032)

Avoid per-item DB queries in ListRuns, ListJobs, and ListActionTasks by
batch-loading trigger users, repositories, and task attributes before
the conversion loop. Remove ReferencesGitRepo from the /actions route
group since no task/run endpoints use it.

Added tests for these endpoints as well.

---------

Signed-off-by: wxiaoguang <wxiaoguang@gmail.com>
Co-authored-by: wxiaoguang <wxiaoguang@gmail.com>
Co-authored-by: silverwind <me@silverwind.io>
Co-authored-by: Claude (Opus 4.7) <noreply@anthropic.com>

routers/api/v1/api.go

@@ -1272,7 +1272,7 @@ func Routes() *web.Router {
 						m.Delete("", reqRepoWriter(unit.TypeActions), repo.DeleteArtifact)
 					})
 					m.Get("/artifacts/{artifact_id}/zip", repo.DownloadArtifact)
-				}, reqRepoReader(unit.TypeActions), context.ReferencesGitRepo(true))
+				}, reqRepoReader(unit.TypeActions))
 				m.Group("/keys", func() {
 					m.Combo("").Get(repo.ListDeployKeys).
 						Post(bind(api.CreateKeyOption{}), repo.CreateDeployKey)