Spin slower send_transaction() (#17166)

we currenly spin-wait for hearing back whether a transaction made it into the mempool or not (in FullNodeAPI.send_transaction()). We currently spin in a very tight loop, which appears to hog a significant amount of CPU. Increase the sleep to spin slower

chia/full_node/full_node_api.py

@@ -1276,7 +1276,7 @@ async def send_transaction(
         )
         # Waits for the transaction to go into the mempool, times out after 45 seconds.
         status, error = None, None
-        sleep_time = 0.01
+        sleep_time = 0.5
         for i in range(int(45 / sleep_time)):
             await asyncio.sleep(sleep_time)
             for potential_name, potential_status, potential_error in self.full_node.transaction_responses: