Add logging for Crank wallet's public key in ObCrankerApplication

A logging statement has been added to output the public key of the 'Crank wallet' in the ObCrankerApplication.java file. This is beneficial for debugging purposes as it provides visibility into the specific wallet being used during runtime.

src/main/java/markets/arcana/obcranker/ObCrankerApplication.java

@@ -49,6 +49,7 @@ public void crankEventHeapLoop() {
         }
         Account finalTradingAccount = tradingAccount;
 
+        log.info("Crank wallet: {}", finalTradingAccount.getPublicKey().toBase58());
         log.info("RPC: {}", endpoint);
 
         scheduler.scheduleAtFixedRate(() -> {