In the LockingMultiRewards contract, users cannot stake when the system is paused.
https://github.com/code-423n4/2024-03-abracadabra-money/blob/1f4693fdbf33e9ad28132643e2d6f7635834c6c6/src/staking/LockingMultiRewards.sol#L150
Additionally, users cannot lock already deposited tokens when the system is paused.
https://github.com/code-423n4/2024-03-abracadabra-money/blob/1f4693fdbf33e9ad28132643e2d6f7635834c6c6/src/staking/LockingMultiRewards.sol#L155
All operations should be disabled when the system is paused.
However, operators can still stake for other users when the system is paused.
https://github.com/code-423n4/2024-03-abracadabra-money/blob/1f4693fdbf33e9ad28132643e2d6f7635834c6c6/src/staking/LockingMultiRewards.sol#L349-L351
Should include the whenNotPaused modifier.
