fix:No module named 'tests' error (#515)

Signed-off-by: OneZero-Y <[email protected]>

Author: OneZero-Y

e2e-tests/04-cache-test.py

@@ -16,7 +16,7 @@
 
 # Add parent directory to path to allow importing common test utilities
 sys.path.append(os.path.dirname(os.path.dirname(os.path.abspath(__file__))))
-from tests.test_base import SemanticRouterTestBase
+from test_base import SemanticRouterTestBase
 
 # Constants
 ENVOY_URL = "http://localhost:8801"