Release Notes:

- Added call diagnostics when collaborating with other Zed users in
collab.

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Co-authored-by: Piotr Osiewicz <24362066+osiewicz@users.noreply.github.com>
Co-authored-by: Piotr Osiewicz <piotr@zed.dev>
Co-authored-by: Danilo Leal <danilo@zed.dev>