revamp changelog for 4.2.0

[aw-was-here]

Summary by Sourcery

Finalize the Version 4.2.0 changelog with an official release date and detailed entries.

New Features:

• Provide early access to Kick.com streaming support with basic chat bot integration
• Add support for JRiver Media Center and MixedInKey DJ software
• Implement JSON-based configuration import/export for settings backup and sharing

Bug Fixes:

• Fix Windows shutdown errors and hostname display issues
• Resolve dropped messages in Twitch integration and various random edge-case bugs
• Improve audio file format compatibility and special-character handling in track data

Enhancements:

• Rebuild Discord integration for better reliability and MusicBrainz cover art via Rich Presence
• Speed up artist information lookups by 3–4× using custom parallel fetchers
• Reimplement MPRIS2 and Serato DJ live playlist handling for increased stability
• Enhance metadata processing for multi-artist tracks and more accurate release dates
• Introduce a "Clear Cache" button in Artist Extras for easier cache management
• Improve compatibility with newer operating systems and network connectivity

[sourcery-ai]

Reviewer's Guide

This PR revamps the CHANGELOG for version 4.2.0 by replacing the old detailed categorized format with a streamlined, date-stamped bullet-style layout and consolidating all major feature additions, performance and reliability enhancements, new integrations, cache controls, and bug fixes in a concise form.

File-Level Changes

Change	Details	Files
Updated version header and reorganized changelog structure	Changed status from “In Progress” to a fixed release date Replaced multi-tier headings with grouped bullet sections Streamlined format for quicker scanning	CHANGELOG.md
Added and updated streaming platform support	Introduced Kick.com chat bot integration for track announcements Fixed long message drops on Twitch Nearly rewrote Discord integration with Rich Presence album cover support	CHANGELOG.md
Integrated new DJ software plugins	Connected JRiver Media Center for automatic track detection Supported MixedInKey’s custom musical key format	CHANGELOG.md
Introduced settings backup and import/export	Enabled JSON export of full configuration Added JSON import preserving API keys, templates, and preferences	CHANGELOG.md
Improved performance and overall reliability	Accelerated artist metadata load by 3–4× with custom code Reduced wait times to 5–15 seconds in live scenarios Fixed Windows “already running” errors and enhanced connection handling	CHANGELOG.md
Refined caching, compatibility, and bug fixes	Added “Clear Cache” button in Artist Extras Rebuilt Serato DJ and MPRIS2 handlers for reliability Fixed Windows shutdown errors, hostname display, audio metadata edge cases	CHANGELOG.md

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[sourcery-ai]

Hey @aw-was-here - I've reviewed your changes and they look great!

Prompt for AI Agents

Please address the comments from this code review:
## Individual Comments

### Comment 1
<location> `CHANGELOG.md:44` </location>
<code_context>
+  * Much more reliable live playlist reading
+
+* MPRIS2
+  * Rebuilt from the ground up for more reliablity
+
+* General Metadata
</code_context>

<issue_to_address>
Typo: 'reliablity' should be 'reliability'.
</issue_to_address>

<suggested_fix>
<<<<<<< SEARCH
* MPRIS2
  * Rebuilt from the ground up for more reliablity
=======
* MPRIS2
  * Rebuilt from the ground up for more reliability
>>>>>>> REPLACE

</suggested_fix>

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