test(ingress): trim the suite to the claim handoff

`tests/test_from_file.py` goes away with the flags it covered. `test_blind_
ingress.py` keeps the agent half, the human fill, both refusals and pending, and
pins the review's done-when list literally:

- an agent `ak-add` with no key prints a claim and does not prompt
- the fill spends the code only after the store succeeds
- an agent `--claim`, and an agent `--key`/`--pass`/`--content`, are refused and
  audited
- the cut flags are absent from `--help`
- the typed value is absent from the claim file, the audit file and the output

`test_pending_store.py` covers the same invariants on the store: the exact
metadata field set, owner-only mode, single use, delete-on-spend and prune on
expiry.
