fix: add cross-day dedupe

tests/test_rss.py

@@ -0,0 +1,58 @@
+import unittest
+
+from ai_daily_report.models import SourceConfig
+from ai_daily_report.sources.rss import parse_rss_items
+
+
+class RssSourceTests(unittest.TestCase):
+    def test_parse_rss_items_filters_entries_older_than_configured_age(self):
+        config = SourceConfig(
+            name="InfoQ AI",
+            type="rss",
+            url="https://feed.example/rss",
+            max_item_age_days=3,
+        )
+        xml = """<?xml version="1.0"?>
+<rss><channel>
+  <item>
+    <title>Fresh item</title>
+    <link>https://example.com/fresh</link>
+    <description>Fresh summary</description>
+    <pubDate>Sun, 07 Jun 2026 06:25:00 GMT</pubDate>
+  </item>
+  <item>
+    <title>Old item</title>
+    <link>https://example.com/old</link>
+    <description>Old summary</description>
+    <pubDate>Mon, 01 Jun 2026 06:25:00 GMT</pubDate>
+  </item>
+</channel></rss>"""
+
+        items = parse_rss_items(config, xml, run_date="2026-06-08")
+
+        self.assertEqual([item["title_raw"] for item in items], ["Fresh item"])
+
+    def test_parse_rss_items_keeps_unparseable_dates_to_avoid_false_drops(self):
+        config = SourceConfig(
+            name="InfoQ AI",
+            type="rss",
+            url="https://feed.example/rss",
+            max_item_age_days=3,
+        )
+        xml = """<?xml version="1.0"?>
+<rss><channel>
+  <item>
+    <title>No date item</title>
+    <link>https://example.com/no-date</link>
+    <description>No date summary</description>
+    <pubDate>not a date</pubDate>
+  </item>
+</channel></rss>"""
+
+        items = parse_rss_items(config, xml, run_date="2026-06-08")
+
+        self.assertEqual([item["title_raw"] for item in items], ["No date item"])
+
+
+if __name__ == "__main__":
+    unittest.main()