ref #3: [feat] add context and tasks for master-service

domain/sandbox.py

@@ -0,0 +1,21 @@
+from dataclasses import dataclass
+from datetime import datetime
+from enum import Enum
+
+
+class SandboxStatus(str, Enum):
+    STARTING = 'starting'
+    RUNNING = 'running'
+    STOPPING = 'stopping'
+    STOPPED = 'stopped'
+    FAILED = 'failed'
+
+
+@dataclass(frozen=True, slots=True)
+class SandboxSession:
+    session_id: str
+    chat_id: str
+    container_id: str
+    status: SandboxStatus
+    created_at: datetime
+    expires_at: datetime