Add integration tests for host (#8912)

tests/integration/const.py

@@ -0,0 +1,14 @@
+"""Constants for integration tests."""
+
+# Network constants
+DEFAULT_API_PORT = 6053
+LOCALHOST = "localhost"
+
+# Timeout constants
+API_CONNECTION_TIMEOUT = 30.0  # seconds
+PORT_WAIT_TIMEOUT = 30.0  # seconds
+PORT_POLL_INTERVAL = 0.1  # seconds
+
+# Process shutdown timeouts
+SIGINT_TIMEOUT = 5.0  # seconds
+SIGTERM_TIMEOUT = 2.0  # seconds