fixup: remove reqwest dependency and tokio runtime, update LSPS5 service

- Replace reqwest::Url with url::Url for webhook URL parsing.
- Remove the Tokio runtime and associated async task for webhook notifications.
- Use a synchronous HTTP client with the HttpClient trait.
- Adjust error handling and message enqueueing for consistency.
- Use LSPSDateTime when necessary.

Author: martinsaposnic