node: add namada_tx_hash field to CometBFT tx result

Author: tzemanovic

crates/node/src/shell/finalize_block.rs

@@ -889,6 +889,10 @@ where
             tx_results.push(tendermint::abci::types::ExecTxResult {
                 code: result_code.into(),
                 gas_used,
+                info: serde_json::to_string(&serde_json::json!({
+                    "namada_tx_hash": tx_hash,
+                }))
+                .unwrap(),
                 ..Default::default()
             });