Update Rust crate serde_json to v1.0.150

[renovate]

This PR contains the following updates:

Package	Type	Update	Change
serde_json	dependencies	patch	1.0.145 → 1.0.150

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Release Notes

serde-rs/json (serde_json)

v1.0.150

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• Reject non-string enum object keys (#​1324, thanks @​puneetdixit200)

v1.0.149

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• Align arbitrary_precision number strings with zmij's formatting (#​1306, thanks @​b41sh)

v1.0.148

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• Update zmij dependency to 1.0

v1.0.147

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• Switch float-to-string algorithm from Ryū to Żmij for better f32 and f64 serialization performance (#​1304)

v1.0.146

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• Set fast_arithmetic=64 for riscv64 (#​1305, thanks @​Xeonacid)

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[doubleword-code]

Summary

This PR updates the serde_json dependency from version 1.0.145 to 1.0.150 via a Cargo.lock-only change. This is a routine maintenance update managed by Renovate.

Verdict: Approved - This is a safe, semver-compatible patch update with no breaking changes for this codebase.

Research notes

I investigated the following:

1. serde_json v1.0.150 release notes (from GitHub releases): The only user-facing change in v1.0.150 is "Reject non-string enum object keys (#1324)". This change affects serialization of enums used as JSON object keys, which this codebase does not use.

2. zmij crate (the new dependency): zmij is a floating-point to string conversion library created by dtolnay (David Tolnay, who also maintains serde_json). It implements the Schubfach and yy algorithms for efficient float formatting. This is an internal implementation detail - the public API of serde_json remains unchanged.

3. Dependency impact: While ryu is removed from serde_json's direct dependencies, it remains in the dependency tree through other crates (redis at line 1012 and serde_urlencoded at line 1221 of Cargo.lock), so there's no risk of removal-related issues.

4. Codebase usage: The project uses serde_json for:

   • Serializing/deserializing request/response models with HashMap<String, serde_json::Value> for extra fields
   • JSON handling in Redis state persistence
   • Error response formatting

   None of these use cases involve enum object keys, so the v1.0.150 change is irrelevant here.

Suggested next steps

1. Merge as-is - This is a standard dependency update with no issues.
2. Optional: Consider updating Cargo.toml to pin serde_json = "1.0.150" if you want to ensure reproducible builds match the tested version, though the current serde_json = "1.0" is acceptable for most projects.

General findings

No issues found. This is a clean, low-risk update:

• Semver-compatible (patch version within 1.x)
• Maintained by trusted authors (dtolnay)
• No breaking changes affecting this codebase
• Lockfile-only update is appropriate for Renovate-managed dependencies