v0.3.0-beta.4

Beta release for testing the native Anycubic camera light entity.

Changes:

• Adds a native Home Assistant light entity for the Anycubic camera light on printers with camera/video or official light support.
• Uses Anycubic Cloud/MQTT light status and control commands.
• Keeps the native printer camera light separate from the optional dashboard-card lightEntityId.
• Adds release safety checks for version synchronization, private local data, branch strategy, and tag/release collisions.
• Documents beta/pre-release handling and the beta branch workflow.
• Removes direct URLs from Home Assistant translation strings so hassfest validation can pass.
• Fixes camera-session typing and aligns CI formatting so the beta branch can pass validation.

Testing notes:

• This is a beta/pre-release. Please install deliberately for testing.
• After installing, restart Home Assistant or reload the integration so the new light platform can be loaded.
• Do not post tokens, private IPs, printer IDs, serial numbers, or personal Home Assistant entity mappings in issue reports.

Note: earlier beta tags were withdrawn after CI exposed validation issues before this beta was finalized.