fix(qconnect): fix queue error decode and add context_uuid to queue commands

ErrorMessage.code was defined as int32 but server sends string codes
(e.g. 'ERROR_QUEUE_INSERT_TRACKS'). Changed to string type and added
logging for queue error responses.

Added context_uuid (random UUID v4) to queue insert and add commands -
the server likely requires this to associate tracks with a context.

crates/qconnect-protocol/Cargo.toml

@@ -10,5 +10,6 @@ qconnect-core = { path = "../qconnect-core" }
 serde = { workspace = true }
 serde_json = { workspace = true }
 thiserror = { workspace = true }
+log = { workspace = true }
 prost = "0.13"
 uuid = { version = "1", features = ["v4"] }

crates/qconnect-protocol/src/decoder.rs

@@ -488,8 +488,7 @@ fn map_queue_error(payload: QueueErrorMessage) -> Result<QueueServerEvent, Proto
     let error_code = payload
         .error
         .as_ref()
-        .and_then(|err| err.code)
-        .map(|code| code.to_string())
+        .and_then(|err| err.code.clone())
         .unwrap_or_else(|| "remote_error".to_string());
     let error_message = payload
         .error
@@ -497,6 +496,10 @@ fn map_queue_error(payload: QueueErrorMessage) -> Result<QueueServerEvent, Proto
         .and_then(|err| err.message.clone())
         .unwrap_or_else(|| "queue_error_message".to_string());
 
+    log::warn!(
+        "[QConnect/Decode] Queue error from server: code={error_code} message={error_message}"
+    );
+
     Ok(QueueServerEvent {
         event_type: QueueEventType::SrvrCtrlQueueErrorMessage,
         action_uuid: uuid_bytes_to_string_opt(payload.action_uuid, "queue_error.action_uuid")?,

crates/qconnect-protocol/src/queue_command_proto.rs

@@ -74,8 +74,10 @@ pub struct QueueVersionRef {
 
 #[derive(Clone, PartialEq, ::prost::Message)]
 pub struct ErrorMessage {
-    #[prost(int32, optional, tag = "1")]
-    pub code: Option<i32>,
+    /// Server sends error codes as strings (e.g. "ERROR_QUEUE_INSERT_TRACKS"),
+    /// not integers. Wire type = LengthDelimited (string).
+    #[prost(string, optional, tag = "1")]
+    pub code: Option<String>,
     #[prost(string, optional, tag = "2")]
     pub message: Option<String>,
 }