Added model classes

Author: Shailesh Jagannath Padave

src/conductor/client/constants.py

@@ -0,0 +1,14 @@
+from enum import Enum
+
+class WorkflowConsistency(str, Enum):
+    """Enum for workflow execution consistency modes"""
+    SYNCHRONOUS = "SYNCHRONOUS"
+    DURABLE = "DURABLE"
+    REGION_DURABLE = "REGION_DURABLE"
+
+class WorkflowSignalReturnStrategy(str, Enum):
+    """Enum for workflow signal return strategies"""
+    TARGET_WORKFLOW = "TARGET_WORKFLOW"
+    BLOCKING_WORKFLOW = "BLOCKING_WORKFLOW"
+    BLOCKING_TASK = "BLOCKING_TASK"
+    BLOCKING_TASK_INPUT = "BLOCKING_TASK_INPUT"