Fix DEFAULT_MAX_RETRIES value from 0 to 2 (#117)

Author: prassanna-ravishankar

src/agentex/_constants.py

@@ -7,7 +7,7 @@
 
 # default timeout is 1 minute
 DEFAULT_TIMEOUT = httpx.Timeout(timeout=300, connect=5.0)
-DEFAULT_MAX_RETRIES = 0
+DEFAULT_MAX_RETRIES = 2
 DEFAULT_CONNECTION_LIMITS = httpx.Limits(max_connections=1000, max_keepalive_connections=1000)
 
 INITIAL_RETRY_DELAY = 0.5