fix: 1.88.0 toolchain, use rust-toolchain.toml in CI

[thedevbirb]

No description provided.

[claude]

Code Review

I found an issue that needs to be addressed:

Issue: Invalid rust-toolchain.toml syntax

File: rust-toolchain.toml (view)

The version key is not valid in rust-toolchain.toml. This key will be silently ignored by rustup, causing the CI to install the latest stable version instead of 1.88.0.

According to the rustup documentation, valid keys under [toolchain] are:

• channel
• components
• targets
• profile
• path

The version key does not exist and will be silently ignored.

Current (incorrect):

[toolchain]
channel = "stable"
version = "1.88.0"

Should be:

[toolchain]
channel = "1.88.0"

The version number should go directly in the channel field. The current configuration will install whatever the latest stable version is, not 1.88.0, which defeats the purpose of this PR.

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Checked for bugs and CLAUDE.md compliance.