feat(reports): store and browse report artifacts

tests/test_repositories.py

@@ -47,7 +47,7 @@ class SchemaTest(unittest.TestCase):
                   "blocklist_reasons", "whitelist_entries",
                   "whitelist_sources", "firewall_snapshots",
                   "firewall_address_list_entries", "firewall_rule_entries",
-                  "whois_info", "log_sources"):
+                  "whois_info", "log_sources", "report_artifacts"):
             self.assertIn(t, tables, f"missing table {t}")
         conn.close()
 
@@ -195,5 +195,54 @@ class FirewallTest(unittest.TestCase):
             "SELECT COUNT(*) FROM firewall_rule_entries").fetchone()[0], 1)
 
 
+class ReportArtifactTest(unittest.TestCase):
+    def setUp(self):
+        self.conn = _new_conn()
+
+    def tearDown(self):
+        self.conn.close()
+
+    def test_artifact_insert_is_idempotent_and_detail_decodes_payload(self):
+        kwargs = {
+            "source": "copyparty", "report_type": "analyzer_summary",
+            "generated_at": "2026-11-01T10:00:00+00:00",
+            "payload": {"summary": {"requests": 12}},
+            "original_path": "reports/copyparty/2026-11-01.txt",
+            "content_sha256": "a" * 64,
+        }
+        first_id = repo.insert_report_artifact(self.conn, **kwargs)
+        duplicate_id = repo.insert_report_artifact(self.conn, **kwargs)
+
+        self.assertEqual(first_id, duplicate_id)
+        self.assertEqual(self.conn.execute(
+            "SELECT COUNT(*) FROM report_artifacts").fetchone()[0], 1)
+        self.assertEqual(repo.get_report_artifact(self.conn, first_id)["payload"],
+                         kwargs["payload"])
+
+    def test_artifact_cursor_orders_stably_and_filters_source(self):
+        for day, source in (("01", "npm"), ("02", "copyparty"),
+                            ("03", "npm")):
+            repo.insert_report_artifact(
+                self.conn, source=source, report_type="summary",
+                generated_at=f"2026-11-{day}T00:00:00+00:00",
+                payload={"day": day}, original_path=f"reports/{day}.txt",
+                content_sha256=day * 64,
+            )
+
+        first = repo.list_report_artifacts(self.conn, source="npm", limit=1)
+        self.assertEqual(len(first["items"]), 1)
+        self.assertIsNotNone(first["next_cursor"])
+        second = repo.list_report_artifacts(
+            self.conn, source="npm", limit=1, cursor=first["next_cursor"])
+        self.assertEqual(len(second["items"]), 1)
+        self.assertIsNone(second["next_cursor"])
+        self.assertGreater(first["items"][0]["generated_at"],
+                           second["items"][0]["generated_at"])
+
+    def test_artifact_cursor_rejects_invalid_token(self):
+        with self.assertRaises(ValueError):
+            repo.list_report_artifacts(self.conn, cursor="invalid")
+
+
 if __name__ == "__main__":
     unittest.main()