fix: add cancellation or timeout to more free tokio::spawn tasks

[hanabi1224]

Summary of changes

Changes introduced in this pull request:

Reference issue to close (if applicable)

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Other information and links

Change checklist

• I have performed a self-review of my own code,
• I have made corresponding changes to the documentation. All new code adheres to the team's documentation standards,
• I have added tests that prove my fix is effective or that my feature works (if possible),
• I have made sure the CHANGELOG is up-to-date. All user-facing changes should be reflected in this document.

Outside contributions

• I have read and agree to the CONTRIBUTING document.
• I have read and agree to the AI Policy document. I understand that failure to comply with the guidelines will lead to rejection of the pull request.

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ℹ️ Recent review info

⚙️ Run configuration

Configuration used: Repository UI

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Plan: Pro

Run ID: 8eddaa1a-f3f2-4068-8b25-d67233f28d53

📥 Commits

Reviewing files that changed from the base of the PR and between cd92ebf and e3f77f6.

📒 Files selected for processing (4)

• src/chain_sync/chain_follower.rs
• src/daemon/mod.rs
• src/libp2p/service.rs
• src/rpc/methods/chain.rs

🔗 Linked repositories identified

CodeRabbit considers these linked repositories for cross-repo context during reviews:

• filecoin-project/lotus (manual)

👮 Files not reviewed due to content moderation or server errors (4)

• src/daemon/mod.rs
• src/rpc/methods/chain.rs
• src/chain_sync/chain_follower.rs
• src/libp2p/service.rs

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✨ Finishing Touches

📝 Generate docstrings

• Create stacked PR
• Commit on current branch

🧪 Generate unit tests (beta)

• Create PR with unit tests
• Commit unit tests in branch hm/handle-tokio-spawn-tasks

✨ Simplify code

• Create PR with simplified code
• Commit simplified code in branch hm/handle-tokio-spawn-tasks

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