PROTM-2270: Add job management API (list/get/cancel) - #181

Summary

Adds a jobs namespace to TinybirdClient (and standalone functions in src/api/jobs.ts) wrapping Tinybird's /v0/jobs endpoints, so the SDK can inspect and manage the async jobs it triggers (ingest/append/replace, connector syncs) instead of only firing them — bringing parity with tb job ls/details/cancel.

Linear: https://linear.app/tinybird/issue/PROTM-2270/typescript-sdk-add-job-management-api-listgetcancelretry

• client.jobs.list({ status?, kind? }) → GET /v0/jobs
• client.jobs.get(jobId) → GET /v0/jobs/{job_id}
• client.jobs.cancel(jobId) → POST /v0/jobs/{job_id}/cancel

New files: src/api/jobs.ts (raw API layer, following the src/api/branches.ts pattern — a JobApiConfig + JobApiError + standalone functions using the shared fetcher) and src/client/jobs.ts (JobsNamespace, mirroring TokensNamespace exactly), wired into TinybirdClient in src/client/base.ts, with types/functions exported from src/index.ts.

retry was scoped out

The ticket description mentions tb job ... retry, but I could not confirm a real /v0/jobs/{job_id}/retry backend endpoint exists:

• The installed Forward CLI client (tinybird/tb/client.py in the Python SDK's venv) only implements jobs(), job(), and job_cancel() — no retry method.
• The CLI's tb job command group (tinybird/tb/modules/job.py) only defines ls, details, and cancel subcommands — there is no tb job retry command at all.
• Grepping platform-api for job retry routes/handlers (/retry, retry_job, job_id.*retry) turned up nothing beyond unrelated HTTP-client retry logic.
• The sibling Python SDK ticket (PROTM-2264, same scope) has no related commits/branches in tinybird-sdk-python's git history to cross-check against.

Given this, I implemented list/get/cancel only rather than ship a retry() call against an endpoint that may not exist. If a retry endpoint does exist, it should be added as a follow-up once confirmed.

Test plan

• pnpm typecheck passes
• pnpm test:run passes (1082 tests, including new src/api/jobs.test.ts and src/client/jobs.test.ts)
• New tests cover: listing with/without status/kind filters, get by id (incl. URL-encoding), cancel, custom fetch override, 404 handling, and generic error-body propagation
• CHANGELOG.md and package.json version intentionally left untouched per repo convention

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