chore: prepare release 0.30.5

[LesnyRumcajs]

Summary of changes

Changes introduced in this pull request:

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 three new Filecoin API endpoints: ChainGetTipSet (v2), StateGetActor (v2), and address conversion functionality (v1 and v2).

• Bug Fixes

  • Resolved a panic issue.

_{✏️ Tip: You can customize this high-level summary in your review settings.}

[coderabbitai]

Walkthrough

The PR documents a new release (v0.30.5) by updating the changelog with three newly implemented Filecoin RPC APIs for different versions and restructures the unreleased section with "Changed" and "Removed" subsections. Version is bumped from 0.30.4 to 0.30.5 in Cargo.toml.

Changes

Cohort / File(s)	Summary
Release documentation CHANGELOG.md	Added three new Filecoin RPC API implementations to v0.30.5 release: ChainGetTipSet (API v2), StateGetActor (API v2), and FilecoinAddressToEthAddress (API v1 and v2). Restructured unreleased section with "Changed" and "Removed" subsections.
Version bump Cargo.toml	Bumped package version from 0.30.4 to 0.30.5.

Estimated code review effort

🎯 1 (Trivial) | ⏱️ ~3 minutes

• Changelog entries are purely documentation updates
• Version bump is straightforward configuration change

Possibly related PRs

• chore(release): prepare v0.30.1 #6093: Modifies the same changelog structure by reorganizing the unreleased section with "Changed"/"Removed" subsections and bumps crate version similarly.
• chore: prepare v0.30.2 release #6141: Updates release artifacts (CHANGELOG.md and Cargo.toml) to prepare a new release with consistent version bumping patterns.

Suggested labels

RPC

Suggested reviewers

• hanabi1224
• akaladarshi

Pre-merge checks and finishing touches

✅ Passed checks (3 passed)

Check name	Status	Explanation
Title check	✅ Passed	The title 'chore: prepare release 0.30.5' directly aligns with the PR's primary objective of preparing a release and matches the version bumps shown in the changeset.
Docstring Coverage	✅ Passed	No functions found in the changed files to evaluate docstring coverage. Skipping docstring coverage check.
Description Check	✅ Passed	Check skipped - CodeRabbit’s high-level summary is enabled.

✨ Finishing touches

• 📝 Generate docstrings

🧪 Generate unit tests (beta)

• Create PR with unit tests
• Post copyable unit tests in a comment
• Commit unit tests in branch prepare-release-0.30.5

---

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