docs(live_view_hook): clarify connect_info requirements and rescue rationale

Expand the moduledoc to explain what each connect_info key provides
and that the hook still works when keys are omitted.

Add a comment to the try/rescue in get_connect_info_if_root/2 explaining
why we rescue broadly (Bandit is optional and we must never crash the
LiveView process).

Co-Authored-By: OpenCode <noreply@opencode.ai>

Author: dl-alexandre

.contrib/contrib.db

@@ -12,13 +12,22 @@ if Code.ensure_loaded?(Phoenix.LiveView) do
       * The user agent and user's IP address
       * Breadcrumbs for events that happen within LiveView
 
-    To make this module work best, you'll need to fetch information from the LiveView's
-    WebSocket. You can do that when calling the `socket/3` macro in your Phoenix endpoint.
-    For example:
+    To get the most complete request context, you'll need to fetch information from
+    the LiveView's WebSocket. You can do that when calling the `socket/3` macro in your
+    Phoenix endpoint. For example:
 
         socket "/live", Phoenix.LiveView.Socket,
           websocket: [connect_info: [:peer_data, :uri, :user_agent]]
 
+    Each key in `connect_info` enriches the Sentry context as follows:
+
+      * `:uri` — overrides the request URL with the WebSocket connect URI
+      * `:user_agent` — adds the user agent to extra context
+      * `:peer_data` — adds the client's IP address to user context
+
+    The hook still works when these keys are omitted, but the corresponding context
+    fields will not be populated.
+
     ## Examples
 
         defmodule MyApp.UserLive do
@@ -235,6 +244,9 @@ if Code.ensure_loaded?(Phoenix.LiveView) do
     defp get_connect_info_if_root(socket, key) do
       case socket.parent_pid do
         nil ->
+          # Bandit raises when the transport is already closed (e.g. client disconnect
+          # during mount). Because Bandit is an optional dependency, we rescue broadly
+          # rather than matching on Bandit.TransportError directly.
           try do
             get_connect_info(socket, key)
           rescue