build(deps): bump rand from 0.9.2 to 0.10.0

[jdhoffa]

Supersedes #61

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[Copilot]

Pull request overview

This PR upgrades the rand crate from version 0.9.2 to 0.10.0, a major version update with several breaking changes. The upgrade requires adapting to API changes including the rename of the Rng trait to RngExt and the removal of Clone support for StdRng.

Changes:

• Updated rand dependency from 0.9.2 to 0.10 in Cargo.toml
• Renamed Rng trait import to RngExt in device type files
• Removed Clone derive from device structs containing StdRng (BaseLoad, SolarPv, EvCharger)
• Replaced .clone() call with explicit instantiation in runner.rs to work around removed Clone support
• Added explicit _f32 type suffixes to float literals in Box-Muller transform

Reviewed changes

Copilot reviewed 6 out of 7 changed files in this pull request and generated no comments.

Show a summary per file

File	Description
Cargo.toml	Updated rand dependency version from 0.9.2 to 0.10
Cargo.lock	Updated dependency tree including replacement of rand_chacha with chacha20 and addition of many transitive dependencies
src/devices/types.rs	Renamed Rng to RngExt import and added _f32 suffixes to float literals
src/devices/baseload.rs	Removed Clone derive from BaseLoad struct (contains StdRng)
src/devices/solar.rs	Removed Clone derive from SolarPv struct (contains StdRng)
src/devices/ev_charger.rs	Renamed Rng to RngExt import and removed Clone derive from EvCharger struct
src/runner.rs	Replaced load.clone() with explicit BaseLoad::new() instantiation using same parameters

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