New request fields in Video SDK API for h323 headers and display names, new session ID, name, and key fields in various Video SDK webhook events, new user key field in sharing started/ended webhook events, and new session ID and name fields in user phone callout webhook events. Bug fixes modify validation of SIP headers display name and URI fields in Video SDK API.

Enhancements to session and user identifiers in webhook events


## Enhancements

New `h323_headers`, `h323_headers.from_display_name`, `h323_headers.to_display_name` request fields in the Video SDK API:
- `PATCH` `/v2/videosdk/sessions/{sessionId}/events`

New `session_id`, `session_name`, and `session_key` fields in the following Video SDK webhook events:
- `session.alert`
- `session.started`
- `session.ended`
- `session.live_streaming_started`
- `session.live_streaming_stopped`
- `session.sharing_started`
- `session.sharing_ended`
- `session.user_joined`
- `session.user_left`

New `user_key` field in the following Video SDK webhook events:
- `session.sharing_started`
- `session.sharing_ended`

New fields `session_id`, `session_name` in the Video SDK webhook events:
- `session.user_phone_callout_ringing`
- `session.user_phone_callout_accepted`
- `session.user_phone_callout_rejected`
- `session.user_phone_callout_missed`

## Bug Fixes

Modify the validation of fields `sip_headers.from_display_name`, `sip_headers.to_display_name`, `sip_headers.from_uri` in the Video SDK API:
- `PATCH` `/v2/videosdk/sessions/{sessionId}/events`
