fix: reject unbounded f64 raw transaction amounts

[samsamtrum]

CreateRawTransactionOutput serialized address amounts with Number::from_f64(...).unwrap(). If a caller passed a nonfinite value such as NaN, serialization could panic.

This returns a serialization error for nonfinite output amounts instead and adds regression coverage.

[storopoli]

small NIT on the error message

[chatgpt-codex-connector]

Codex usage limits have been reached for code reviews. Please check with the admins of this repo to increase the limits by adding credits.
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[storopoli]

ACK 2b2da9d

[chatgpt-codex-connector]

Codex usage limits have been reached for code reviews. Please check with the admins of this repo to increase the limits by adding credits.
Credits must be used to enable repository wide code reviews.

[storopoli]

@codex review

[chatgpt-codex-connector]

Codex Review: Didn't find any major issues. Delightful!

Reviewed commit: fd55742810

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[storopoli]

ACK fd55742