- Deleted the legacy WebSocket client implementation (`wstoclient.go`) and its test file (`wstoclient_test.go`).
- Removed legacy handling from the HTTP manager, including legacy proxy setup and routing.
- Cleaned up session management by removing legacy host checks and related functions.
- Eliminated the legacy WebRTC handler and its associated logic.
- Updated session interface to remove legacy methods.
- Removed legacy API documentation and configuration options from migration guide and help files.
* This is a no-op with the default configuration: when only a single video pipeline is configured, there is nothing for the stream selector to switch to. The change only has an effect when the operator configures multiple pipelines and enables the bandwidth estimator.
* fix(session): guard against nil WebRTC peer in profileChanged"
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Co-authored-by: alvarorichard <alvarorichard@tuta.io>