chore: prepare v0.30.2 release

[akaladarshi]

Summary of changes

Changes introduced in this pull request:

• prepare release v0.30.2 Garuda

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 CLI commands/options: snapshot export-diff, state actor-cids, and backfill --n-tipsets.
  • Added an API method to retrieve the finalized tipset via F3.

• Documentation

  • Updated changelog for v0.30.2 “Garuda,” including an “Added” section and removal of empty placeholders.

• Chores

  • Bumped version to 0.30.2.

[coderabbitai]

Walkthrough

Adds new unreleased v0.30.2 entry to CHANGELOG with CLI additions and an API method note; removes empty sections. Bumps package version to 0.30.2 in Cargo.toml. No code or API declarations changed in this diff.

Changes

Cohort / File(s)	Summary
Changelog updates CHANGELOG.md	Added v0.30.2 “Garuda” entry with three CLI enhancements and a note about Filecoin.ChainGetFinalizedTipset; removed empty Changed/Removed headings.
Version bump Cargo.toml	Updated package version from 0.30.1 to 0.30.2.

Estimated code review effort

🎯 1 (Trivial) | ⏱️ ~3 minutes

Suggested reviewers

• hanabi1224
• elmattic

Pre-merge checks and finishing touches

✅ 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 “chore: prepare v0.30.2 release” succinctly and accurately captures the primary change of bumping the version and updating the changelog for the v0.30.2 release.
Docstring Coverage	✅ Passed	No functions found in the changes. Docstring coverage check skipped.

✨ Finishing touches

🧪 Generate unit tests (beta)

• Create PR with unit tests
• Post copyable unit tests in a comment
• Commit unit tests in branch akaladarshi/new-release

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📜 Recent review details

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📥 Commits

Reviewing files that changed from the base of the PR and between 4661ae8 and e354098.

⛔ Files ignored due to path filters (1)

• Cargo.lock is excluded by !**/*.lock

📒 Files selected for processing (2)

• CHANGELOG.md (1 hunks)
• Cargo.toml (1 hunks)

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_{Comment @coderabbitai help to get the list of available commands and usage tips.}

[elmattic]

@akaladarshi Nice release name!🪽