Перенес workflow

src/app_runtime/workflow/contracts/context.py

@@ -0,0 +1,16 @@
+from __future__ import annotations
+
+from dataclasses import dataclass, field
+from typing import Any
+
+
+@dataclass(slots=True)
+class WorkflowContext:
+    payload: dict[str, Any]
+    state: dict[str, Any] = field(default_factory=dict)
+
+    def snapshot(self) -> dict[str, Any]:
+        return {
+            "payload": dict(self.payload),
+            "state": dict(self.state),
+        }