chore: modernize dependencies and update to Rust 2021 edition #1
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Summary
error-chainwiththiserrorfor modern error handlingserde_derivedependency, use serde'sderivefeature insteadenv_loggerfrom 0.9 to 0.11Motivation
Addresses reviewer feedback about ancient dependencies:
The dependency tree is now modern:
regex1.12.2 (was 0.2.11 via old queryst)thiserror1.0.69 (replaces unmaintainederror-chain)env_logger0.11.8Test plan
cargo clippypasses with no warningscargo fmt --checkpasses🤖 Generated with Claude Code