fix: mask secrets on every path they leave a job (#1188)

A secret in a matrix value reached the log in the clear:

```yaml
strategy:
  matrix:
    include: "${{ github.token }}"
```

Chasing that one route is pointless, so this masks every sink a secret leaves a job by: the uploaded log rows and the on-disk `job.log`, both through one choke point in `appendLogRow`; the runner's own log, which is where planning errors like that one land with no job logger in reach; the job logger's stdout under debug logging; job summaries; job outputs; and the job name that becomes a container name.

Values the runner knows but the job never declared, the proxy password and the task token, are hidden the same way. Masks apply longest first, since `strings.Replacer` matches in argument order and one secret prefixing another would otherwise mask the prefix and print the rest.

### What changes for users

An output whose value carries a secret is skipped with a warning instead of sent, matching GitHub. Output that showed a secret now shows `***`. `ACTIONS_STEP_DEBUG` and `ACTIONS_RUNNER_DEBUG` are never masked, also matching GitHub, so an output of `true` still reaches the jobs that need it.

Each fix has a test that fails without it.

Reviewed-on: https://gitea.com/gitea/runner/pulls/1188
Reviewed-by: bircni <bircni@icloud.com>
Co-authored-by: silverwind <me@silverwind.io>

act/runner/job_executor.go

@@ -388,7 +388,7 @@ func setJobResult(ctx context.Context, info jobInfo, rc *RunContext, success boo
 
 	if rc.caller != nil {
 		// set reusable workflow job result
-		rc.caller.setReusedWorkflowJobResult(rc.JobName, jobResult) // For Gitea
+		rc.caller.setReusedWorkflowJobResult(rc.Run.JobID, jobResult) // For Gitea
 		return
 	}
 
@@ -487,7 +487,8 @@ func tryUploadJobSummary(ctx context.Context, rc *RunContext) {
 		if !ok || len(body) == 0 {
 			continue
 		}
-		uploadJobSummary(ctx, client, base+strconv.Itoa(i)+"/summary", runtimeToken, body)
+		// Gitea renders summaries on the run page, so mask before the upload.
+		uploadJobSummary(ctx, client, base+strconv.Itoa(i)+"/summary", runtimeToken, []byte(rc.maskSecrets(string(body))))
 	}
 }