Note

Medium Risk
Updates the ijson git dependency, which may affect JSON parsing/serialization behavior in core module code. Added tests reduce regression risk but any subtle formatting/precision changes could impact client-visible JSON.GET output.

Overview
Bumps the ijson git dependency to a newer commit (updating both Cargo.toml and Cargo.lock).

Adds new FPHA regression coverage ensuring JSON.GET serializes typed-array floats (FP16/BF16/FP32/FP64), including negative values, with short/clean decimals instead of noisy f64-style representations.

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