Gate realtime audio interruption logic to v2 (#14984)

- thread the realtime version into conversation start and app-server
notifications
- keep playback-aware mic gating and playback interruption behavior on
v2 only, leaving v1 on the legacy path

codex-rs/core/src/auth_env_telemetry.rs

@@ -71,6 +71,7 @@ mod tests {
             request_max_retries: None,
             stream_max_retries: None,
             stream_idle_timeout_ms: None,
+            websocket_connect_timeout_ms: None,
             requires_openai_auth: false,
             supports_websockets: false,
         };

codex-rs/core/src/config/mod.rs

@@ -1535,13 +1535,7 @@ pub enum RealtimeWsMode {
     Transcription,
 }
 
-#[derive(Serialize, Deserialize, Debug, Clone, Copy, Default, PartialEq, Eq, JsonSchema)]
-#[serde(rename_all = "snake_case")]
-pub enum RealtimeWsVersion {
-    #[default]
-    V1,
-    V2,
-}
+pub use codex_protocol::protocol::RealtimeConversationVersion as RealtimeWsVersion;
 
 #[derive(Serialize, Deserialize, Debug, Clone, Default, PartialEq, Eq, JsonSchema)]
 #[schemars(deny_unknown_fields)]

codex-rs/core/src/realtime_conversation.rs

@@ -371,7 +371,8 @@ pub(crate) async fn handle_start(
         format!("{prompt}\n\n{startup_context}")
     };
     let model = config.experimental_realtime_ws_model.clone();
-    let event_parser = match config.realtime.version {
+    let version = config.realtime.version;
+    let event_parser = match version {
         RealtimeWsVersion::V1 => RealtimeEventParser::V1,
         RealtimeWsVersion::V2 => RealtimeEventParser::RealtimeV2,
     };
@@ -411,6 +412,7 @@ pub(crate) async fn handle_start(
         id: sub_id.clone(),
         msg: EventMsg::RealtimeConversationStarted(RealtimeConversationStartedEvent {
             session_id: requested_session_id,
+            version,
         }),
     })
     .await;