fix(rpc): add read, write and idle timeout to rpc handler

[parthshah1]

Related Issues

Adding read, write and idle timeouts in rpc handler. Fixes this bug.

Proposed Changes

Adding additional timeouts for rpc handler.

Additional Info

Checklist

Before you mark the PR ready for review, please make sure that:

• [X ] Commits have a clear commit message.
• [X ] PR title conforms with contribution conventions
• Update CHANGELOG.md or signal that this change does not need it per contribution conventions
• New features have usage guidelines and / or documentation updates in
  • Lotus Documentation
  • Discussion Tutorials
• Tests exist for new functionality or change in behavior
• CI is green

[github-actions]

Please update the PR title to match https://github.com/filecoin-project/lotus/blob/master/CONTRIBUTING.md#pr-title-conventions

[parthshah1]

@rvagg 1 MB header limit seems way too generous imo, do we expect such large headers. Maybe 64 Kb suffice.

PR title now matches the required format.

[rvagg]

@parthshah1 would you mind adding an entry to the changelog for this? just follow the pattern there and link back to this PR, you could even just copy and paste the PR title here (which I've modified slightly).

[BigLep]

Related slack discussion: https://filecoinproject.slack.com/archives/C05P37R9KQD/p1756354215245379

[BigLep]

Followup happening in #13327