Introduce Devii agents subsystem with supervisor, policy, and evals

- Add agents package: controller, runner, store, tools, actions, evals, policy
- Wire agents into Devii service, session, registry, CLI, and dispatcher
- Extend database schema and config for agent persistence
- Add news and telegram bridge updates plus landing UI and docs
- Cover agents, news, and telegram flows with unit tests

tests/unit/services/devii/agents/actions.py

@@ -0,0 +1,55 @@
+# retoor <retoor@molodetz.nl>
+
+from devplacepy.services.devii.agents.actions import AGENT_ACTIONS
+
+
+def _by_name():
+    return {action.name: action for action in AGENT_ACTIONS}
+
+
+def test_six_agent_tools_with_agent_handler():
+    assert sorted(_by_name()) == [
+        "agent_cancel",
+        "agent_list",
+        "agent_result",
+        "agent_start",
+        "agent_status",
+        "ask_user",
+    ]
+    for action in AGENT_ACTIONS:
+        assert action.handler == "agent"
+        assert action.method == "LOCAL"
+        assert action.summary.strip()
+
+
+def test_auth_mirrors_tasks():
+    tools = _by_name()
+    assert tools["agent_start"].requires_auth is True
+    assert tools["agent_cancel"].requires_auth is True
+    assert tools["agent_status"].requires_auth is False
+    assert tools["agent_result"].requires_auth is False
+    assert tools["agent_list"].requires_auth is False
+    assert tools["ask_user"].requires_auth is False
+
+
+def test_start_carries_the_four_part_contract():
+    params = {p.name: p for p in _by_name()["agent_start"].params}
+    assert params["category"].required is True
+    assert params["task"].required is True
+    assert params["output_format"].required is True
+    assert params["tools_extra"].type == "array"
+    assert "label" in params
+    assert "budget_hint" in params
+
+
+def test_result_resumes_with_an_answer():
+    params = {p.name: p for p in _by_name()["agent_result"].params}
+    assert params["uid"].required is True
+    assert params["answer"].required is False
+
+
+def test_uid_params_are_required():
+    tools = _by_name()
+    for name in ("agent_status", "agent_cancel"):
+        params = {p.name: p for p in tools[name].params}
+        assert params["uid"].required is True