fix(security): remediate tract-nnef advisory

[proerror77]

Change contract

Update the ONNX inference dependency from tract 0.21 to the patched 0.22 line, removing RUSTSEC-2026-0217 from the locked dependency graph.

Acceptance evidence

• Red: cargo audit reported RUSTSEC-2026-0217 for tract-nnef 0.21.10.
• Green: cargo audit reports zero instances of that advisory.
• cargo test -p hft-infer-onnx --locked
• cargo test -p hft-strategy-dl --locked

Out of scope

Polymarket Gate admission, collectors/uploaders, production cutover, research, and snapshots.

Dependency or merge order

Independent of #433 / #434. Merge before #434 because the repository-required Cargo audit currently blocks #434 against the same unchanged lockfile.

Rollout / rollback impact

No runtime deployment in this PR. The dependency update is reverted by reverting this PR; #434 remains separately rollbackable.

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Run ID: eb9e5e0f-26a7-4f20-b9f9-dae53c0f293c

📥 Commits

Reviewing files that changed from the base of the PR and between 00a2a8a and f720892.

⛔ Files ignored due to path filters (1)

• rust_hft/Cargo.lock is excluded by !**/*.lock

📒 Files selected for processing (1)

• rust_hft/strategy-framework/infer-onnx/Cargo.toml

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