Support Retell Scrubbed Transcripts in Dashboard

I want ChatDash to display the redacted/scrubbed transcript from Retell instead of the original one. Currently, Retell sends both a standard 'transcript' and a 'scrubbed_transcript_with_tool_calls' field. ChatDash only shows the original transcript, which means PII is still visible even when redaction is enabled in Retell. This is important for HIPAA compliance (e.g., for dental offices) so that sensitive patient information is not visible in the ChatDash dashboard.