[worker] run device run session jobs

[szdziedzic]

Why

Last PR of the stack (#4412 schema, #4413 runner). The worker has to recognize DeviceRunSession.Job payloads and hand them to the runner instead of the steps engine.

How

• build.ts: in the platform-less branch, a job with type === 'device-run-session' runs through runDeviceRunSessionJobAsync; everything else keeps using runGenericJobAsync. The runner validates the payload and rejects with the error to report on the job run.
• external/turtle.ts: the jobRun dispatch message may carry Generic.Job | DeviceRunSession.Job.
• service.ts: the Sentry workflow tag is only set for build jobs; session jobs get a jobType tag instead, since type means something different on them.

Nothing changes for build jobs or generic jobs. The orchestrator passes the payload through unchanged, so no change is needed there.

Rollout note: the API server must not send DeviceRunSession.Job payloads before the production worker includes this change. An old worker would take the generic branch and fail on the missing steps, which errors the session loudly rather than hanging. The universe PR that starts sending the payload (admin sessions first) is gated on this deploy.

Test Plan

• New unit test: session jobs go to the runner, generic jobs still go to the steps runner, and a runner error propagates so the job run is reported as errored.
• Existing worker unit tests pass (12 suites).
• yarn typecheck, yarn lint, yarn fmt:check pass.

🤖 Generated with Claude Code

[github-actions]

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[codecov]

Codecov Report

❌ Patch coverage is 75.00000% with 1 line in your changes missing coverage. Please review.
✅ Project coverage is 72.39%. Comparing base (5273662) to head (7a78c07).

Files with missing lines	Patch %	Lines
packages/worker/src/service.ts	0.00%	1 Missing ⚠️

Additional details and impacted files

@@                              Coverage Diff                               @@
##           szdziedzic-claude/eas-simulator-job-runner    #4414      +/-   ##
==============================================================================
- Coverage                                       72.41%   72.39%   -0.01%     
==============================================================================
  Files                                             986      987       +1     
  Lines                                           46678    46747      +69     
  Branches                                         9997    10013      +16     
==============================================================================
+ Hits                                            33796    33838      +42     
- Misses                                          11882    11905      +23     
- Partials                                         1000     1004       +4     

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