Pass session to server health

Author: kclowes

src/ethereum_clis/transition_tool.py

@@ -296,20 +296,16 @@ def _evaluate_filesystem(
 
         return output
 
-    def _check_server_health(self):
+    def _check_server_health(self, session: Session):
         """Check if the server is still responsive and restart if needed."""
         try:
-            with Session() as session:
-                # Try a simple health check with a minimal POST request
-                session.post(self.server_url, json={}, timeout=2)
-
+            session.post(self.server_url, json={}, timeout=2)
             return True
         except Exception:
-            # Server seems to be down, try to restart it
             self.shutdown()
             time.sleep(0.1)
             self.start_server()
-            time.sleep(0.5)  # give server time to restart
+            time.sleep(0.5)
             return False
 
     def _server_post(
@@ -334,8 +330,7 @@ def _server_post(
                 )
                 break
             except (RequestsConnectionError, ReadTimeout) as e:
-                # Try to restart the server if it's down
-                if not self._check_server_health():
+                if not self._check_server_health(session):
                     # Server was restarted, try again
                     continue
                 retries -= 1