v8.2.0

Added

• Add Security.md and activate private vulnerability reporting
• Add RealTime endpoint to create WebRTC token - thank you to @ngelx for the PR and others for input!
• Add multi-image upload - thank you to @ryankon and others for requesting.
• Refactor streaming so that Chat, Responses, Assistant Runs and any others where events are streamed now send the event to the Proc, replacing unused _bytesize. Search the README for _event to see how to use this. Important change implemented by @ingemar!
• Handle OpenAI::Files request parameters - thank you to @okorepanov for the PR.
• Add Gemini docs - thanks to @francis.
• Add web proxy debugging docs - thanks to @cpb.
• Add Rails / ActiveStorage transcription docs - thanks to @AndreyAzimov.