Teams(jobs): mock drop-in stub for the full HF Jobs API

[Copilot]

The hf jobs CLI is becoming a central workflow tool; without any Jobs API endpoints the Python client errors immediately. This adds a fully-shaped in-memory stub so the CLI and huggingface_hub library work against this server without requiring real compute.

Server (Rust)

• state.rs — JobsStore (Mutex<HashMap> pair for jobs + scheduled jobs) added to HubState
• routes/jobs.rs — 13 stub handlers; auth-gated, namespace-scoped, correctly shaped JSON responses:
  • One-off: POST/GET /api/jobs/{owner}, GET /api/jobs/{owner}/{id}, POST …/cancel, GET …/logs (SSE), GET …/metrics (SSE)
  • Hardware catalogue: GET /api/jobs/hardware — returns 5 real flavor entries
  • Scheduled: full CRUD + suspend/resume under /api/scheduled-jobs/{owner}/…
• routes/mod.rs — routes wired in; hardware route registered before {owner} to avoid collision
• Jobs land in QUEUED stage; cancel transitions to CANCELLED; SSE endpoints return a single stub event

Tests

• tests/integration/hf_hub/test_jobs_stub_batch7.py — 14 pytest tests using the real huggingface_hub client:

job = run_job(image="python:3.12", command=["python", "-c", "print('hello')"],
              endpoint=hf_session["endpoint"], token=hf_session["token"])
assert job.status.stage == "QUEUED"
assert job.flavor == "cpu-basic"

cancel_job(job_id=job.id, endpoint=..., token=...)
assert inspect_job(job_id=job.id, ...).status.stage == "CANCELLED"

Tracking

• docs/hf_hub_testing_roadmap.md — batch 7 added as planned; Jobs removed from explicit non-goals
• resources/hf_hub_compat/checklist.json — batch 7 entry; jobs → jobs_full_compute in non_goals
• docs/feature_support_matrix.md — Jobs/Compute: In Roadmap ✅, status ⚠️ (stub)