Improve AI daily report operations and dedupe observability

tests/test_clients.py

@@ -1,5 +1,6 @@
 import json
 import unittest
+from email.message import Message
 from urllib.error import HTTPError
 from unittest.mock import patch
 
@@ -65,6 +66,20 @@ class ClientTests(unittest.TestCase):
             self.assertEqual(client.create_post({"title": "t"})["slug"], "ai-2026-06-04")
             client.publish_post("ai-2026-06-04")
 
+    def test_blog_api_client_slug_lookup_falls_back_to_query_endpoint(self):
+        responses = [
+            HTTPError("https://blog.example/api/service/posts/ai-2026-06-10", 404, "Not Found", Message(), None),
+            FakeResponse(json.dumps({"items": [{"slug": "ai-2026-06-10", "content": "body"}]}).encode("utf-8")),
+        ]
+        with patch("urllib.request.urlopen", side_effect=responses) as urlopen:
+            client = BlogApiClient(base_url="https://blog.example", token="token")
+            post = client.get_post_by_slug("ai-2026-06-10")
+
+        self.assertIsNotNone(post)
+        assert post is not None
+        self.assertEqual(post["slug"], "ai-2026-06-10")
+        self.assertEqual(urlopen.call_count, 2)
+
 
 if __name__ == "__main__":
     unittest.main()