FormatException: Public key cannot be empty when processing restore events

[BraCR10]

Description

After performing a restore, MostroService._onData throws and silently discards certain events. The error appears repeatedly in logs but does not crash the app.

Error

FormatException: Failed to parse Peer from JSON: FormatException: Public key cannot be empty
#0   MostroService._onData (package:mostro_mobile/services/mostro_service.dart:172:14)
#1   <asynchronous suspension>

Context

• Occurs during/after restore when the relay replays historical events
• The event is silently dropped — state is not updated

Reproduction

Perform a restore on an account.

• Documented in docs/architecture/DISPUTE_CHAT_RESTORE.md