chore(release): prepare release v0.31.1

[akaladarshi]

Summary of changes

Changes introduced in this pull request:

• prepare release v0.31.1 "Quadrantids" (meteor shower)

Reference issue to close (if applicable)

Closes

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.

Summary by CodeRabbit

• New Features

  • Added API v2 Filecoin methods: EthCall and EthEstimateGas.
  • Renamed API v2 trace item from EthReplayBlockTransactionTrace to EthTraceReplayBlockTransactions.

• Documentation

  • Reorganized unreleased changelog with Added, Changed, Removed, and Fixed sections.
  • Removed an empty Removed subsection and preserved existing entries; added optional v0.31.1 "Quadrantids" notes.

• Chores

  • Bumped package version to v0.31.1.

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[coderabbitai]

Walkthrough

Updates changelog structure and adds a non-mandatory Forest v0.31.1 "Quadrantids" entry documenting added Filecoin API v2 methods; replaces one Added item name; removes an empty Removed subsection; bumps package version in Cargo.toml from 0.31.0 to 0.31.1. No functional source code changes.

Changes

Cohort / File(s)	Summary
Changelog CHANGELOG.md	Restructured "Forest unreleased" by adding Changed, Removed, and Fixed subsections; removed an empty Removed header; added a v0.31.1 "Quadrantids" entry with Added items for API v2 (Filecoin.EthCall, Filecoin.EthEstimateGas, etc.); renamed EthReplayBlockTransactionTrace to EthTraceReplayBlockTransactions in an Added item.
Version Bump Cargo.toml	Bumped package version from 0.31.0 to 0.31.1.

Estimated code review effort

🎯 1 (Trivial) | ⏱️ ~2 minutes

Possibly related PRs

• chore(release): release v0.28.0 "Denethor's Folly" #5856 — Similar changelog edits and Cargo.toml version bump.
• chore(release): prepare v0.30.0 #6052 — Similar release-prep changelog restructuring and version increment.
• chore(release): prepare v0.30.1 #6093 — Similar changelog subsection additions and patch version bump.

Suggested labels

RPC

Suggested reviewers

• hanabi1224
• LesnyRumcajs
• sudo-shashank

🚥 Pre-merge checks | ✅ 3

✅ Passed checks (3 passed)

Check name	Status	Explanation
Description Check	✅ Passed	Check skipped - CodeRabbit’s high-level summary is enabled.
Title check	✅ Passed	The title clearly and concisely describes the main purpose: preparing a release v0.31.1, which aligns with the changelog and version update changes.
Docstring Coverage	✅ Passed	No functions found in the changed files to evaluate docstring coverage. Skipping docstring coverage check.

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[hanabi1224]

Can we include #6456 in this release?