chore(deps): bump ant-core 0.2.0 -> 0.2.2

[Nic-dorman]

Summary

Bumps the ant-core library crate pin to ant-core-v0.2.2 — the tag at the same SHA as today's ant-cli-v0.2.1 release. Two-line change in Cargo.toml/Cargo.lock.

What's now reachable

This bump unblocks downstream work in this repo:

Upstream PR	What it adds	Downstream consumer
WithAutonomi/ant-client#68	external-signer progress events through prepare/finalize	ant-ui #66 (currently draft, pinned to a temporary branch)
WithAutonomi/ant-client#39	Visibility arg on file_prepare_upload, data_map_address on FileUploadResult	ant-ui #32 (currently draft)
WithAutonomi/ant-client#31	shared devnet-manifest write-side	already merged as ant-ui #9 (read-side companion)
(internal)	new ant_core::datamap_file module — msgpack canonical + JSON legacy auto-detect, the canonical helper for datamap I/O	available for future datamap rework

Transitive bumps

Picked up automatically via the lockfile:

• ant-protocol 2.0.1 → 2.0.2
• saorsa-core 0.24.0 → 0.24.1

Test plan

• cargo check --all-targets — clean, 36s
• cargo clippy --all-targets -- -D warnings — clean
• cargo fmt --check — clean
• npx vitest run — 21/21 pass
• Reviewer to spot-check that the Cargo.lock churn matches the table above (no surprise transitives)

Notes

• No ant-gui version bump in this PR — that's a separate release-prep concern.
• After this lands, ant-ui feat(uploads): live progress for external-signer flow + wagmi fixes #66 should be rebased to drop its temporary branch pin and exit draft, and feat: wire public-visibility uploads through the external-signer flow #32 should be rebased + smoked against the new symbols (Visibility, file_prepare_upload_with_visibility, FileUploadResult.data_map_address).

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