fix(transport): route order-bound notices by request id

[faysou]

Summary

• Preserve the originating request or order ID on Notice while keeping request‑less notices represented as None.
• Send order‑bound error frames to the order update stream as classified notices instead of raw error frames that an order decoder cannot represent.
• Classify code 399 as informational only when its message contains a line beginning with Warning:. Other code 399 messages remain order rejections.

flowchart LR
    TWS[TWS error frame] --> Decode[Decode error envelope]
    Decode --> Classify{Request ID and severity}
    Classify -- Order-bound warning --> Update[Order update stream: Notice]
    Classify -- Order-bound error --> Update
    Classify -- Request-scoped --> Request[Request subscription]
    Classify -- Request-less --> Global[Global notice stream]

Loading

Order consumers receive the request ID and severity without adding the intercepted error message type to any domain decoder.

Testing

• cargo test -p ibapi --features sync.
• Paper TWS forced‑rejection smoke: hard order errors remained terminal.
• Paper TWS code 399 smoke: a warning‑form stop order remained active and could be cancelled.