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/news.py

@@ -170,6 +170,55 @@ def test_grade_article_unparseable_returns_none(local_db, monkeypatch):
     assert grade is None
 
 
+class FlakyGradeClient(FakeClient_news_service):
+    def __init__(self, failures_before_success):
+        super().__init__([])
+        self.failures_before_success = failures_before_success
+        self.posts = 0
+
+    async def post(self, url, json=None, headers=None, timeout=None):
+        self.posts += 1
+        if self.posts <= self.failures_before_success:
+            return FakeResp_news_service(status=500, text="err")
+        return FakeResp_news_service(
+            json_data={"choices": [{"message": {"content": "8"}}]}
+        )
+
+
+def test_grade_article_retries_transient_failures(local_db, monkeypatch):
+    from devplacepy.services.news import GRADE_ATTEMPTS
+
+    monkeypatch.setattr(news_mod, "get_setting", _settings_stub())
+    client = FlakyGradeClient(failures_before_success=2)
+    grade = run_async(
+        NewsService()._grade_article(
+            {"title": "FlakyArticle", "description": "d", "content": "c"},
+            AI_URL,
+            "m",
+            client,
+        )
+    )
+    assert grade == 8
+    assert client.posts == 3
+
+
+def test_grade_article_gives_up_after_max_attempts(local_db, monkeypatch):
+    from devplacepy.services.news import GRADE_ATTEMPTS
+
+    monkeypatch.setattr(news_mod, "get_setting", _settings_stub())
+    client = FlakyGradeClient(failures_before_success=GRADE_ATTEMPTS + 5)
+    grade = run_async(
+        NewsService()._grade_article(
+            {"title": "FlakyArticle", "description": "d", "content": "c"},
+            AI_URL,
+            "m",
+            client,
+        )
+    )
+    assert grade is None
+    assert client.posts == GRADE_ATTEMPTS
+
+
 def test_run_once_handles_api_failure(local_db, monkeypatch):
     monkeypatch.setattr(news_mod, "get_setting", _settings_stub())
     monkeypatch.setattr(base_mod, "get_setting", _settings_stub())