v0.54.3 — Solana polls prove the wallet; the decide skill teaches Decisions

Changed — Solana media polls prove the wallet instead of paying (#176)

On the Solana wallet rail, a pending video job used to need a fresh SPL
payment signature on every poll (~20s apart): a payment is a transaction
pinned to a ~60-90s blockhash, and it was the only proof of who was asking.
sol.blockrun.ai now also accepts an ownership proof: an ed25519 signature by
the submitting wallet over blockrun-poll:v1:<kind>:<job id>:<unix seconds>,
sent as x-poll-wallet / x-poll-timestamp / x-poll-signature. It signs a
text message, not a transaction, so nothing it carries can move money.

• video: pending polls send only the proof. The finished job answers 402
  with status: "completed"; the client signs one payment from that
  challenge, pinned to the submit's amount, recipient and fee payer, and the
  existing payment-signed path settles it.
• music / image: paid at submit, so their polls never sign a payment.
• fallback: a refused proof (video 400 Invalid job id, audio/image 404
  Job not found) or any 402 that is not the completion challenge switches
  the job once to payment-signed polling, and says so on stderr.
• An unpaid completion challenge is not a result: the poll classifier decides
  on each answer's own status, so a later bodiless 2xx keeps polling
  instead of booking the quote with no video.
• The Base rail and the account (API key) rail are unchanged. bs58 is now
  a declared dependency.

Changed — the decide skill now teaches Decisions; OpenJev is retired

BlockRun replaced OpenJev (its self-hosted NLI judgment model) with an OpenAI
Decisions-compatible endpoint served by gpt-6-luna on 2026-10-07. The skill
taught api.blockrun.ai/v1/decide with the state / noul / criteria
shape and explained OpenJev's normalised scores, none of which describe what
answers now.

skills/decide now covers POST https://api.blockrun.ai/v1/decisions:
input + questions as an array, predicate / choice (choices) /
score (levels), and image input. It is served only there, free for any
registered key. There is no x402 rail: the x402 floor is above what a
Decisions call costs, so the paid route was never deployed (gateway #804).
The example response is a live call. The old /v1/decide shape is still
accepted there and is named as legacy. Still a skill, not a tool, for the
reason 0.52.0 gave. skills/blockrun and the marketplace entry point at the
new path.