plane(2.2): runner -- delivery {put, inputs} in the start body, PUT to the store

StartGate.offer validates an optional `delivery` beside the credentials: https
URLs to a hostname (never an address, no userinfo; AX_RUNNER_INSECURE_DELIVERY=1
admits http in unit tests only), names ^[A-Z][A-Z0-9_]*$, a 400 that names the
field and echoes no URL. The runner PUTs its output tar to delivery.put and
GETs each declared input from delivery.inputs[NAME] (deliver() gains a method;
log lines and DeliveryError carry the URL without its query, so no presigned
signature reaches a log, a marker or a summary). OUSAST_ARTIFACT_URL/DIAL stay
honoured until task 2.6 so both paths run in the same build; the completion
marker and the retry-only boot are unchanged, and a re-start brings a fresh
URL for the retry. Router.start_task carries `delivery` in the body and
redacts its URLs like credential values. Tests: the gate's acceptance and
refusals, an end-to-end PUT/GET against the S3-shaped fake with no URL in any
log or file, the failed-PUT-then-retry-only boot, deliver() with PUT.

Gates: pytest 2024 passed, 42 skipped, exit 0; ruff check 0; ruff format 0;
mypy 0.

Co-Authored-By: Claude Fable 5.1 <[email protected]>
Claude-Session: https://claude.ai/code/session_01EmM1j46qgKMh3zqD1QMwEo

.kiro/specs/plane-on-kubernetes/tasks.md

@@ -78,7 +78,7 @@ go-ahead** with a ceiling; steps that need a hand on a cluster that does not exi
   - `tests/test_plane_delivery.py`: against a local S3-shaped fake (PUT/GET/HEAD by key); URLs never appear in
     logs; expiry; member rejection; declared-only re-put; state seeding.
   - _Requirements: 3.1, 2.1_
-- [ ] 2.2 Runner: `delivery` in the start body
+- [x] 2.2 Runner: `delivery` in the start body
   - `src/openultrasast/plane/runner.py`: `StartGate.offer` validates an optional `delivery {put, inputs}` (https,
     hostname, no echo); `_deliver_output` PUTs the tar to `delivery.put` (same retry and `DeliveryError`
     semantics); `fetch_inputs` GETs from `delivery.inputs[name]`; `OUSAST_ARTIFACT_URL` and `OUSAST_ARTIFACT_DIAL`