add explanatory comment

Author: dmoka

pallets/omnipool/src/lib.rs

@@ -2152,6 +2152,9 @@ impl<T: Config> Pallet<T> {
 			.delta_update(&state_changes.asset)
 			.ok_or(ArithmeticError::Overflow)?;
 
+		// Using total balance to include reserved LRNA in balance calculations.
+		// Speciically important uin case when LRNA is in lockdown by our deposit limit circuit breaker
+		// If we used free_balance, ratio will increase as more LRNA gets locked, causing add liquidity to fail.
 		let hub_reserve_ratio = FixedU128::checked_from_rational(
 			new_asset_state.hub_reserve,
 			T::Currency::total_balance(T::HubAssetId::get(), &Self::protocol_account())