Remove unused Rust dependencies

[igor04091968]

$## Summary\n- remove cargo-machete-confirmed unused direct dependencies from four Rust crates\n- keep the PR separate from docs PR #60 and base it on the lockfile-normalization branch\n- update only workspace package dependency lists in Cargo.lock; no dependency version churn\n\n## Removed\n- aw-contour-smoke: chrono, url\n- detmir-status: serde\n- hayabusa-tools: urlencoding\n- worktime-api: urlencoding\n\n## Verification\n- manual rg verification for source usage\n- cargo metadata --offline --format-version 1\n- cargo test -p aw-contour-smoke -p detmir-status -p hayabusa-tools -p worktime-api --locked\n- cargo machete\n- git diff --check\n- cargo metadata --locked --format-version 1\n- cargo clippy -p aw-contour-smoke -p detmir-status -p hayabusa-tools -p worktime-api --all-targets --locked -- -D warnings

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