feat(ray): rework host-submit lineage around roar-worker and fragments

[TrevorBasinger]

Summary

This PR reworks the roar run ray job submit ... path so Ray jobs bootstrap through a dedicated roar-worker, stream lineage as encrypted fragments, and reconstitute that lineage back into the host-local .roar/roar.db after submission completes.

It also rounds out the supporting pieces: packaged preload/native tracer artifacts, new register targets for Ray-shaped lineage, and a much larger host-submit/cloud-topology test suite.

What Changed

• Ray submit/bootstrap: wrap Ray job entrypoints with roar.ray.driver_entrypoint, use worker_process_setup_hook plus roar-worker instead of the old roar.ray.worker path, add fixed
  local proxy / node-agent bootstrap behavior, and support cluster-visible GLaaS/S3 endpoint overrides.
• Driver/worker env handling: use RAY_JOB_ID and ROAR_JOB_INSTRUMENTED for Ray job auto-init and git-bypass behavior when drivers run from extracted working dirs rather than a repo checkout.
• Fragment delivery: move Ray collection to fragment-first semantics, stream encrypted fragment batches to GLaaS, and treat local collection as reconstitution from fragments rather than the old actor/filesystem log path.
• Fragment reconstitution: merge streamed fragments back into local jobs/artifacts, dedupe proxy fallback refs, restore packaged working_dir paths to host project paths, and materialize composite outputs during rebuild.
• Tracing/packaging: package preload/native tracer artifacts with new sync/build scripts, ship roar_inject.pth, probe preload launcher readiness, add Linux GLIBC floor verification for wheels, and carry thread-aware metadata through native tracing.
• Registration UX: extend roar register to accept artifact paths, DAG step refs like @4, and local session hash/prefixes, with better parent normalization for Ray-shaped/reconstituted jobs.
• Docs/tests: update Ray integration docs to match the fragment-driven architecture and replace older actor/filesystem-focused Ray tests with host-submit/cloud-topology contract coverage, including S3, native tracing, timing, proxy reachability, crash/partial-fragment, and cloud-demo-like workloads.
• Quality cleanup: remove stale coverage that still targeted the deleted roar.ray.worker contract and restore ruff, mypy, and unit-test green status after the refactor.