fix(batch): classify RequestTimeoutError as timeout in --all --wait fan-out (#154)

* fix(batch): classify RequestTimeoutError as timeout in --all --wait fan-out

When test run --all --wait or test rerun --all --wait hit a per-request timeout
during batch fan-out polling, RequestTimeoutError rejected the fan-out before
out.print(). Classify it as status:'timeout' in pollFreshAccepted and
pollAccepted so stdout always lists every dispatched runId.

Co-authored-by: Cursor <cursoragent@cursor.com>

* Remove unused readFileSync import from test file

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Co-authored-by: Contributor <contributor@testsprite.com>
Co-authored-by: Cursor <cursoragent@cursor.com>

Author: 3 people