[Rust] Release 0.52.1

Fixed

• multipleOf rejecting valid values like 1070468.14 for 0.01 without arbitrary-precision.

Performance

• minLength and maxLength together now scan the string once.
• multipleOf with a fractional divisor is 8-16x faster.
• unevaluatedProperties is up to 2.9x faster.
• evaluate is up to 27% faster on reference-heavy schemas.