[IMPROVE] General federation improvements (#26150)

apps/meteor/app/federation-v2/client/index.ts

apps/meteor/app/federation-v2/server/Federation.ts

...ration-v2/server/application/AbstractFederationService.ts

...p/federation-v2/server/application/RoomServiceListener.ts

...p/federation-v2/server/application/RoomServiceReceiver.ts

...app/federation-v2/server/application/RoomServiceSender.ts

...federation-v2/server/application/input/RoomReceiverDto.ts

...p/federation-v2/server/application/input/RoomSenderDto.ts

...2/server/application/sender/RoomInternalHooksValidator.ts

...eration-v2/server/application/sender/RoomServiceSender.ts

apps/meteor/app/federation-v2/server/domain/FederatedRoom.ts

apps/meteor/app/federation-v2/server/domain/FederatedUser.ts

...teor/app/federation-v2/server/domain/IFederationBridge.ts

apps/meteor/app/federation-v2/server/index.ts

...meteor/app/federation-v2/server/infrastructure/Factory.ts

.../app/federation-v2/server/infrastructure/matrix/Bridge.ts

...2/server/infrastructure/matrix/converters/RoomReceiver.ts

.../infrastructure/matrix/definitions/AbstractMatrixEvent.ts

.../server/infrastructure/matrix/definitions/IMatrixEvent.ts

...IMatrixEventContent/IMatrixEventContentAddMemberToRoom.ts