perf: clear deallocation queue once per strategy in modifyAllocations

[MozirDmitriy]

Motivation:

The deallocationQueue is indexed only by (operator, strategy), not by operatorSet, therefore:
with multiple sets (operatorSet) and/or multiple strategies in a single call, the same queue will attempt to clear itself multiple times;
after the first complete clearing, subsequent calls only read the length and exit immediately, but these are still unnecessary reads and cycles.

Modifications:

Switched modifyAllocations to take AllocateParams[] calldata params and added per-call tracking of seen strategies so clearDeallocationQueue(operator, strategy, type(uint16).max) is invoked at most once per (operator, strategy) per transaction instead of on every inner loop iteration.

Result:

For a batch modifyAllocations that touches the same strategy across multiple operator sets, the contract will do fewer reads and iterations over deallocationQueue[operator][strategy], reducing gas, while still guaranteeing that all completable pending deallocations for that strategy are cleared before applying any new allocation changes.