refactor: replace lazy_static! with std::sync::LazyLock

[vwinee21]

Closes #5035

Summary

Replace all usages of the lazy_static crate with std::sync::LazyLock from the standard library, which was stabilized in Rust 1.80.

Changes

• Removed lazy_static dependency from 8 Cargo.toml files
• Added use std::sync::LazyLock imports where needed
• No behavior changes — purely mechanical substitution

Why

• Eliminates an external dependency in favor of stdlib
• LazyLock is thread-safe, drop-in equivalent to lazy_static's static ref pattern
• Cleaner syntax, no macro magic required

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[CLAassistant]

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