fix(aggregator): aggregator memory leak could lead to denial of service

[entropidelic]

When a new task is created, several aggregator maps are written to with task-specific information. If the service runs for long enough, it could run out of memory, causing the Aggregator to stop functioning.

Check aggregator/internal/pkg/aggregator.go
These are the maps we should clean once the task is responded

	agg.batchesIdxByIdentifierHash[batchMerkleRoot] = batchIndex
	agg.batchCreatedBlockByIdx[batchIndex] = uint64(taskCreatedBlock)
	agg.batchesIdentifierHashByIdx[batchIndex] = batchMerkleRoot
	agg.batchDataByIdentifierHash[batchMerkleRoot] = BatchData{
		BatchMerkleRoot: batchMerkleRoot,
		SenderAddress:   [20]byte{},
	}

[uri-99]

solved in linked pr