clarify situation with respect to multiple networks in the same networkstoreservice

[jonenst]

Describe the current behavior

We have a lot of code in the different caches/buffers to deal with multiple networks (e.g.

powsybl-network-store/network-store-iidm-impl/src/main/java/com/powsybl/network/store/iidm/impl/NetworkCollectionIndex.java

Line 30 in d33534a

return collections.computeIfAbsent(Pair.of(networkUuid, variantNum), p -> factory.get());

) but NetworkStoreService always recreates the client (and also the networkfactory) :

powsybl-network-store/network-store-client/src/main/java/com/powsybl/network/store/client/NetworkStoreService.java

Line 112 in d33534a

return new NetworkFactoryImpl(() -> decorator.apply(restClient, getNonNullPreloadingStrategy(preloadingStrategy), executorService));

powsybl-network-store/network-store-client/src/main/java/com/powsybl/network/store/client/NetworkStoreService.java

Line 120 in d33534a

return getNetworkFactory(preloadingStrategy).createNetwork(id, sourceFormat);

powsybl-network-store/network-store-client/src/main/java/com/powsybl/network/store/client/NetworkStoreService.java

Line 189 in d33534a

Network network = importer.importData(dataSource, getNetworkFactory(preloadingStrategy), parameters, reporter);

powsybl-network-store/network-store-client/src/main/java/com/powsybl/network/store/client/NetworkStoreService.java

Line 207 in d33534a

NetworkStoreClient storeClient = decorator.apply(restClient, getNonNullPreloadingStrategy(preloadingStrategy), executorService);

Describe the expected behavior

make the system more complete and regular

Describe the motivation

No response

Extra Information

No response