fix: resolve clippy warnings in integration matrix

[kioku]

Summary

• fix clippy duration_suboptimal_units findings by using larger-unit constructors for cache TTLs
• replace sort_by closures with sort_by_key in URL query normalization and search ranking logic
• keep behavior unchanged while removing warnings that were promoted to errors in CI

Validation

• cargo fmt --all -- --check
• cargo clippy --all-targets --features integration -- -D warnings
• cargo clippy -- -D warnings
• cargo test

[codecov-commenter]

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Codecov Report

❌ Patch coverage is 93.75000% with 1 line in your changes missing coverage. Please review.

Files with missing lines	Patch %	Lines
src/batch/mod.rs	0.00%	1 Missing ⚠️

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