Sweep 2026-07-23: bump ant-client to 24989150

[JimCollinson]

Daily upstream-drift sweep. Metadata-only stamp refresh; no prose changed.

Upstream: ant-client: 9a4d8c4d → 24989150 (PR #150 fix/single-node-min-quotes).

Source artifacts inspected: ant-core/src/data/client/batch.rs, ant-core/src/data/client/payment.rs, ant-core/src/data/client/quote.rs, ant-core/src/data/client/file.rs, ant-core/src/data/mod.rs, and the ant-core payment/security e2e tests, all at the head SHA.

Developer-facing change: internal refactor; no developer-facing impact. The single-node payment path now builds from at least one witnessed quote rather than requiring a full close group of quotes, and the payment builder moved from ant_protocol::payment::SingleNodePayment to a new ant_core::data::SingleNodeQuotePayment type with the median-quote 3x multiplier lifted into a named constant. None of these symbols appear in any recorded docs page or in SKILL.md, and the documented Direct Rust surface (PaymentIntent.total_amount, ExternalPaymentInfo::WaveBatch/::Merkle, PaymentMode, ClientConfig, PreparedMerkleBatch, Visibility) is intact at the head SHA. No CLI command, flag, or --help surface changed.

Files changed in this PR:

• 19 docs pages — source_commit/verified_date refreshed on the ant-client verification block only (non-ant-client blocks left byte-identical): docs/architecture/system-overview.md, docs/cli/command-reference.md, docs/cli/use-the-cli.md, docs/core-concepts/{data-types,keys-addresses-and-datamaps,overview,payment-model}.md, docs/guides/{build-read-only-features,deploy-to-mainnet,overview,prepare-a-wallet-for-uploads,test-your-application}.md, docs/index.md, docs/reference/{glossary,source-repositories}.md, docs/rust/{README,build-directly-in-rust,library-reference}.md, docs/sdk/how-to-guides/use-external-signers-for-upload-payments.md.
• skills/start/version.json — verified_commits.ant-client value refreshed (version, published_date unchanged).
• skills/start/SKILL.md — frontmatter verified_commits.ant-client value and verified_date refreshed (body, version, CHANGELOG.md unchanged).
• planning/sweeps/2026-07-23.md — new run summary.

Verification run:

• python3 scripts/sweep_poll.py re-run on this branch → status: "ok", 0 drifted records.
• version.json re-parsed as JSON → valid; version/published_date unchanged.
• SKILL.md frontmatter re-parsed as YAML → valid; body unchanged, version still 0.1.6-draft.
• Endpoint/type re-grep against the pinned ant-client head checkout confirmed PaymentIntent { payments, total_amount }, ExternalPaymentInfo::WaveBatch/::Merkle, and the library-reference type table still exist.
• markdownlint — skipped (not installed in the routine environment).

Uncertainties: none.

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