OpenAI-Dotnet 8.8.2

What's Changed

• OpenAI-Dotnet 8.8.2 by @StephenHodgson in #489
  • Add file_url for responses api by @gfreezy
  • Added NoiseReductionSettings for RealtimeConfiguration by @eapark
  • Fix ConversationItemTruncateRequest.ContentIndex default serialization by @eapark
  • Added support for gpt-5 and latest API changes
  • Added ConversationsEndpoint
  • Fixed streaming ResponsesEndpoint log spamming (now only properly logs when DebugEnabled)
• OpenAI-DotNet-Proxy 8.8.2 by @StephenHodgson
  • Updated forwarded request headers

Full Changelog: v8.8.1...v8.8.2