foreign chain config/votes are not cleaned up when removing participant

[DSharifi]

Background

In vote reshared we get potentially new set of participants. If a participant is removed, we should also clean up their foreign chain config from the contract, otherwise we risk collecting stale data.

mpc/crates/contract/src/lib.rs

Lines 1207 to 1240 in ba631ef

	if let Some(new_state) = self.protocol_state.vote_reshared(key_event_id)? {
	// Resharing has concluded, transition to running state
	self.protocol_state = new_state;
	// Spawn a promise to clean up votes from non-participants.
	// Note: MpcContract::vote_update uses filtering to ensure correctness even if this cleanup fails.
	Promise::new(env::current_account_id())
	.function_call(
	method_names::REMOVE_NON_PARTICIPANT_UPDATE_VOTES.to_string(),
	vec![],
	NearToken::from_yoctonear(0),
	Gas::from_tgas(self.config.remove_non_participant_update_votes_tera_gas),
	)
	.detach();
	// Spawn a promise to clean up TEE information for non-participants
	Promise::new(env::current_account_id())
	.function_call(
	method_names::CLEAN_TEE_STATUS.to_string(),
	vec![],
	NearToken::from_yoctonear(0),
	Gas::from_tgas(self.config.clean_tee_status_tera_gas),
	)
	.detach();
	// Spawn a promise to clean up orphaned node migrations for non-participants
	Promise::new(env::current_account_id())
	.function_call(
	method_names::CLEANUP_ORPHANED_NODE_MIGRATIONS.to_string(),
	vec![],
	NearToken::from_yoctonear(0),
	Gas::from_tgas(self.config.cleanup_orphaned_node_migrations_tera_gas),
	)
	.detach();
	}

User Story

No response

Acceptance Criteria

foreign chain configs of non participants are removed if the participant leaves the network

Resources & Additional Notes

No response