Only mark propagated txs as seen

[mattsse]

Describe the feature

currently we're marking txs as seen

reth/crates/net/network/src/transactions/mod.rs

Lines 435 to 436 in 71bf575

	for tx in &to_propagate {
	if peer.seen_transactions.insert(tx.hash()) {

before we're truncating the hashes or full transactions:

reth/crates/net/network/src/transactions/mod.rs

Lines 460 to 462 in 71bf575

	new_pooled_hashes.truncate(
	SOFT_LIMIT_COUNT_HASHES_IN_NEW_POOLED_TRANSACTIONS_BROADCAST_MESSAGE,
	);

reth/crates/net/network/src/transactions/mod.rs

Line 473 in 71bf575

let new_full_transactions = full_transactions.build();

TODO

• only check if !.contains and only insert actually propagated txs into seen_transactions

Additional context

No response

[SkandaBhat]

Hey @mattsse could I pick this up? Can you assign this to me?