fix: job container, daemon startup, action cache and exec fixes (#1294)

- Keep `GITHUB_ENV`, `GITHUB_OUTPUT`, `GITHUB_STATE` and `GITHUB_PATH` when a job times out or is cancelled, so post steps still get their state
- Retry the startup Declare while Gitea is unreachable instead of exiting, still failing fast on rejected registrations, auth and misconfiguration
- Reuse a local image when a platform variant such as `linux/arm/v7` is requested instead of pulling again
- Read `PATH` from the created job container so cross-architecture jobs get tool paths for the right architecture
- Extract action copies relative to the act volume so they never cross an image's `/var/run` symlink, which rootless Podman rejects
- Keep the job container's entrypoint when container options set `--entrypoint`, warning instead of appending it to the keep-alive command
- Lock action cache entries across runner processes that share a cache directory
- `exec`: omit `GITHUB_SERVER_URL` and `GITHUB_API_URL` without `--gitea-instance` instead of exporting a bare `https://`, and read owner and repository from any origin remote

Reviewed-on: https://gitea.com/gitea/runner/pulls/1294
Reviewed-by: bircni <[email protected]>
Co-authored-by: silverwind <[email protected]>

act/runner/job_executor.go

@@ -29,7 +29,10 @@ import (
 	"gitea.dev/actionslib/pkg/model"
 )
 
-const maxJobSummaryBytes = 1024 * 1024
+const (
+	jobCleanupTimeout  = time.Minute
+	maxJobSummaryBytes = 1024 * 1024
+)
 
 // jobSummaryTruncationMarker is appended to a summary that exceeded the size limit
 // so the rendered output makes the truncation visible instead of silently cutting off.
@@ -249,7 +252,7 @@ func newJobExecutor(info jobInfo, sf stepFactory, rc *RunContext) common.Executo
 		jobError := common.JobError(ctx)
 		var err error
 		// always allow 1 min for stopping and removing the runner, even if we were cancelled
-		ctx, cancel := context.WithTimeout(common.WithLogger(context.Background(), common.Logger(ctx)), time.Minute)
+		ctx, cancel := context.WithTimeout(common.WithLogger(context.Background(), common.Logger(ctx)), jobCleanupTimeout)
 		defer cancel()
 
 		logger := common.Logger(ctx)