fix: Use bytes signature for smart wallet EIP-3009 transfers

[apmcdermott]

The facilitator's settle function was calling parseSignature() on all signatures, which failed for smart wallets with:

Error: expected valid s: 1 <= n < 115792089237316195423570985008687907852837564279074904382605163141518161494337, got 0

Solution

Use the bytes signature overload of transferWithAuthorization instead of the (v, r, s) overload for smart wallets.

Checklist

• [x] I have formatted and linted my code
• [x] All new and existing tests pass
• [x] My commits are signed (required for merge) -- you may need to rebase if you initially pushed unsigned commits

[cb-heimdall]

✅ Heimdall Review Status

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Project	Deployment	Preview	Comments	Updated (UTC)
x402	Ready	Preview	Comment	Dec 4, 2025 7:35pm

[cb-heimdall]

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