Add daily grader audit workflow (#56359)

* Add daily grader audit workflow

Co-authored-by: pelikhan <4175913+pelikhan@users.noreply.github.com>

* Clarify staged logs filter behavior

Co-authored-by: pelikhan <4175913+pelikhan@users.noreply.github.com>

* Propagate logs rate limit cancellation

Co-authored-by: pelikhan <4175913+pelikhan@users.noreply.github.com>

* Preserve logs rate limit retry semantics

Co-authored-by: pelikhan <4175913+pelikhan@users.noreply.github.com>

* Log logs rate limit retry errors

Co-authored-by: pelikhan <4175913+pelikhan@users.noreply.github.com>

* Preserve logs rate limit continue behavior

Co-authored-by: pelikhan <4175913+pelikhan@users.noreply.github.com>

* Keep logs pagination retry behavior explicit

Co-authored-by: pelikhan <4175913+pelikhan@users.noreply.github.com>

* Handle logs rate limit cancellation explicitly

Co-authored-by: pelikhan <4175913+pelikhan@users.noreply.github.com>

* Match logs cancellation return contract

Co-authored-by: pelikhan <4175913+pelikhan@users.noreply.github.com>

* Advance logs iteration after rate limit errors

Co-authored-by: pelikhan <4175913+pelikhan@users.noreply.github.com>

* docs(adr): add draft ADR-56359 for grader run filter and daily audit workflow

Co-Authored-By: Claude Sonnet 4.6 <noreply@anthropic.com>

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Co-authored-by: copilot-swe-agent[bot] <198982749+Copilot@users.noreply.github.com>
Co-authored-by: pelikhan <4175913+pelikhan@users.noreply.github.com>
Co-authored-by: github-actions[bot] <41898282+github-actions[bot]@users.noreply.github.com>
Co-authored-by: Claude Sonnet 4.6 <noreply@anthropic.com>
Co-authored-by: Peli de Halleux <pelikhan@users.noreply.github.com>