Only slash undelegations that started after the misbehaviour

[maurolacy]

When slashing associated pending undelegations from a validator

mesh-security/contracts/provider/external-staking/src/state.rs

Lines 95 to 108 in 0b5173e

	/// Slashes all the entries in `pending_unbonds`, returning total slashed amount.
	pub fn slash_pending(&mut self, info: &BlockInfo, slash_ratio: Decimal) -> Uint128 {
	self.pending_unbonds
	.iter_mut()
	.filter(|pending| pending.release_at > info.time)
	.map(|pending| {
	let slash = pending.amount * slash_ratio;
	// Slash it
	pending.amount -= slash;
	slash
	})
	.sum()
	}
	}

we need to filter out not only those that have already expired (done), but also those that started before the misbehaviour we're now processing.

This is not possible right now because we don't have access to the misbehaviour's height and time. These would need to be sent along with the validators to jail and tombstone.

Not doing this would introduce differences, in some cases, between on-chain slashing and the slashing accounting on the contracts.

[maurolacy]

This is now addressed as part of #179.

What is still missing is sending the proper misbehaviour time from blockchain code. Zero is currently being sent: osmosis-labs/mesh-security-sdk#125.

Will create a follow-up issue in the SDK repo and reference it here.