how does the Electrum node aggregate your addresses to your particular wallet? is it b/c your specific request for your addy's are bundled or linked to a specific session?
AFAIK your wallet sends the addresses it wants to know the balance/transaction to the node (server), the node figures out this info and sends the balance and transactions data back to you. Your wallet (client) is the one that initially knows the addresses, which are originated from the wallet seed.
Was that your question? (I may have misinterpreted it).