feat(agentscope): add memory system and automation job support

- Add consumer_registry and pipeline_registry for runtime orchestration
- Add Visibility schema for message filtering
- Add PipelineSpec for agent pipeline configuration
- Add automation job models and configuration
- Remove memory_prompt.py (consolidated into memory system)
- Update runtime components: context_loader, context_service, orchestrator, runner, tasks
- Update toolkit: tool_config, tool_middleware, custom tools (calendar, user_lookup)
- Add auth_helpers and calendar_domain utilities
- Add system_agents.yaml configuration

backend/tests/unit/schemas/agent/test_system_agent.py

@@ -0,0 +1,31 @@
+from __future__ import annotations
+
+import pytest
+
+from schemas.agent.system_agent import SystemAgentLLMConfig
+
+
+def test_system_agent_llm_config_normalizes_enabled_tools_aliases() -> None:
+    config = SystemAgentLLMConfig.model_validate(
+        {
+            "enabled_tools": [
+                "calendar.write",
+                "calendar_write",
+                "user.lookup",
+            ]
+        }
+    )
+
+    assert [tool.value for tool in config.enabled_tools] == [
+        "calendar.write",
+        "user.lookup",
+    ]
+
+
+def test_system_agent_llm_config_rejects_unknown_enabled_tool() -> None:
+    with pytest.raises(ValueError, match="unknown enabled tool"):
+        SystemAgentLLMConfig.model_validate(
+            {
+                "enabled_tools": ["calendar.remove"],
+            }
+        )