app: change max tx bytes constant to 96KB (#4683)

## Describe your changes
During team sync today we decided that this new value is superior.



## Issue ticket number and link
Follow-up to related work in #4614, #4627, and #4632.

## Checklist before requesting a review

- [x] If this code contains consensus-breaking changes, I have added the
"consensus-breaking" label. Otherwise, I declare my belief that there
are not consensus-breaking changes, for the following reason:

> This change does affect consensus and so should be treated carefully.

Co-authored-by: Conor Schaefer <[email protected]>

crates/core/app/src/app/mod.rs

@@ -54,8 +54,8 @@ type InterBlockState = Arc<StateDelta<Snapshot>>;
 /// The maximum size of a CometBFT block payload (1MB)
 const MAX_BLOCK_TXS_PAYLOAD_BYTES: usize = 1024 * 1024;
 
-/// The maximum size of a single individual transaction (30KB).
-const MAX_TRANSACTION_SIZE_BYTES: usize = 30 * 1024;
+/// The maximum size of a single individual transaction (96KB).
+const MAX_TRANSACTION_SIZE_BYTES: usize = 96 * 1024;
 
 /// The maximum size of the evidence portion of a block (30KB).
 const MAX_EVIDENCE_SIZE_BYTES: usize = 30 * 1024;

testnets/cometbft_config_template.toml

@@ -316,7 +316,7 @@ keep-invalid-txs-in-cache = false
 
 # Maximum size of a single transaction.
 # NOTE: the max size of a tx transmitted over the network is {max_tx_bytes}.
-max_tx_bytes = 30720
+max_tx_bytes = 98304
 
 # Maximum size of a batch of transactions to send to a peer
 # Including space needed by encoding (one varint per transaction).