plane(2.1): Delivery -- presigned store URLs, collection, state mirrored to the store

src/openultrasast/plane/delivery.py: Delivery(store, run, base) mints a presigned
PUT for runs/<run>/<task>/output.tar and a GET per declared input
(runs/<run>/<producer>/<artifact>), expiry OUSAST_TASK_TIMEOUT + 600 s;
delivered() asks the store for the exact key; collect() downloads, extracts
under the run directory with the receiver's member checks (no symlink, hard
link or escape; nothing written on a rejection), re-puts the declared outputs
as single objects and writes done.json; put_input() for inputs no task
produces; save_state()/load_state() mirror state.json. The reconciler opens the
store first (no fallback; the CLI reports a store that cannot open and submits
nothing), mirrors state.json after every change and seeds a rerun with no local
state from the store (the 2.1 bullet's state mirroring is what gives the new
module its importer). The reconciler crossed 500 lines here (517) rather than at
2.4 as 1.6 projected: the bound moves to 550 with the reason in the assertion,
as 1.6 decided. tests/plane_fake_store.py is the S3-shaped fake (objects in a
dict, presigned URLs on a local server); tests/test_plane_delivery.py covers the
body, expiry, polling, rejection, declared-only re-put, state seeding and that
no URL reaches a log. Module-audit manifest regenerated (148/5, no orphan).

Gates: pytest 2020 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

@@ -68,7 +68,7 @@ go-ahead** with a ceiling; steps that need a hand on a cluster that does not exi
   - _Requirements: 1.1, 1.2, 1.3, 7.1_
 
 - [ ] 2. Store delivery, receiver-less egress (design section 3)
-- [ ] 2.1 Presigned URLs and the store run directory
+- [x] 2.1 Presigned URLs and the store run directory
   - `src/openultrasast/plane/delivery.py`: `Delivery(store, run)` mints presigned PUT for
     `runs/<run>/<task>/output.tar` and GET for `runs/<run>/<producer>/<artifact>` (boto3 `generate_presigned_url`
     on `S3Client.sdk`, expiry `OUSAST_TASK_TIMEOUT + 600`); `delivered(task)` HEADs the tar; `collect(task)`