Fix batch examples reading .outputs from batch results

[jadenfix]

JobBatch.wait() returns AgentJobResultItem objects, whose outputs are in .result (nullable), not .outputs. examples/run_agent_many.py and the batch example in examples/run_agent_with_timeout.py raised AttributeError once jobs finished. This matches the batch example in SDK_EXAMPLES.md.

Testing

• ruff check / ruff format --check on examples/.
• Checked the field names against roe._generated.models.agent_job_result_item.

Testing against the live API requires a Roe API key, so these were verified with unit tests and local mock servers only.

Related issues (behaviour changes discussed separately, not changed here): #85, #86, #87, #88

[greptile-apps]

Confidence Score: 5/5

[Low impact] The PR appears safe to merge.

Summary

Both batch examples now read outputs from AgentJobResultItem.result instead of the nonexistent .outputs field.

• Batch examples print outputs from each job result.

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