Participant status message is misleading when coordinator is still waiting for commitments

[jCabala]

The participant logs "Waiting for coordinator to send signing package..." while the coordinator is actually still waiting for commitments from other signers. This makes it look like the coordinator is the bottleneck when it's actually another participant that hasn't joined yet.

• src/participant/comms/http.rs:237 — "Signing package received" only after all commitments are in

Originally created in: https://github.com/Nori-zk/mina-multi-sig-example/blob/main/FEEDBACK.md