Fix job linking and taskset lookup

[jdchawla29]

when hud eval is run with a taskset without --taskset, the job link is created but not sent to the platform

---

Note

Medium Risk
Changes task loading and job registration/telemetry for both local and remote eval runs, and removes HuggingFace/BYOK paths; regressions could break existing CLI workflows or platform job association.

Overview
hud eval now correctly associates jobs with platform tasksets. When the source is a platform taskset, the CLI captures the returned taskset_id and passes it through to job registration (_send_job_enter) and local execution (run_dataset/hud.eval). It also adds --taskset resolution so running a local tasks file can still link the job to an existing platform taskset.

Task loading and remote submission were simplified. HuggingFace dataset loading and the --byok/use_byok plumbing are removed, loader errors now surface as httpx exceptions, and job naming was standardized via _get_eval_name. Docs and examples were updated to reflect platform taskset usage, new/clarified flags (--taskset, --gateway, --quiet), and the SDK version bumps to 0.5.29.

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