Known performance issue with blocking calls.

[tristanpoland]

The TODO comment indicates a known performance issue with blocking calls. In an async runtime migration, this blocking pattern could cause deadlocks or performance degradation and should be prioritized for resolution.

Horizon/crates/horizon_event_system/src/system/handlers.rs

Line 480 in 634a0ea

// TODO: This blocking call is not ideal - we should implement this in a non-blocking way

Originally posted by @Copilot in #284 (comment)