Adds `giant train-submit`/`giant rollout-submit`, mirroring `giant analyze
submit`'s CPU-job pattern but for single remote-GPU jobs: +RemoteJob/
RequestGPUs, TARGET.ProvidesEtpCeph instead of the local-only
ProvidesETPResources, and a self-contained condor/ run dir (wrapper, submit
description, and a CondorJobMeta sidecar recording what was submitted and
the assigned cluster id) so a run stays traceable after the fact. Training
jobs re-check for last.pt on every wrapper invocation so a preempted job
resumes instead of restarting.
Also adds `giant new-run` to scaffold a run's config.toml + run dir (with
collision-free naming via the new shared `default_out_dir`) ahead of
submission, and factors router-flag parsing into `_router_cli_overrides`
so `train` and `new-run` resolve it identically.
Co-Authored-By: Claude Sonnet 5 <noreply@anthropic.com>
lars
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