Fix clippy warnings and handle cargo-deny advisories

[encounter]

Summary

• Silence nightly clippy mismatched lifetime warnings by explicitly naming elided lifetimes
• Enable git-based advisory database fetching and ignore unavoidable advisories
• Update tracing-subscriber to 0.3.20 to resolve security advisory

Testing

• cargo +nightly clippy
• cargo deny check

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https://chatgpt.com/codex/tasks/task_e_68c510b8de5c833182de71cf0de7d0fa