Switch dashboard/map/history views to archive source for long-term data

Update fail2ban dbpurgeage to 648000 and history sync backfill/pagination for archive-based 7.5 day history.

backend/tests/test_routers/test_dashboard.py

@@ -428,6 +428,15 @@ class TestBansByCountry:
         called_range = mock_fn.call_args[0][1]
         assert called_range == "7d"
 
+    async def test_invalid_source_returns_422(
+        self, dashboard_client: AsyncClient
+    ) -> None:
+        """An invalid source value returns HTTP 422."""
+        response = await dashboard_client.get(
+            "/api/dashboard/bans/by-country?source=invalid"
+        )
+        assert response.status_code == 422
+
     async def test_empty_window_returns_empty_response(
         self, dashboard_client: AsyncClient
     ) -> None:
@@ -722,6 +731,15 @@ class TestBanTrend:
         )
         assert response.status_code == 422
 
+    async def test_invalid_source_returns_422(
+        self, dashboard_client: AsyncClient
+    ) -> None:
+        """An invalid source value returns HTTP 422."""
+        response = await dashboard_client.get(
+            "/api/dashboard/bans/trend?source=invalid"
+        )
+        assert response.status_code == 422
+
     async def test_empty_buckets_response(self, dashboard_client: AsyncClient) -> None:
         """Empty bucket list is serialised correctly."""
         from app.models.ban import BanTrendResponse
@@ -857,6 +875,15 @@ class TestBansByJail:
         )
         assert response.status_code == 422
 
+    async def test_invalid_source_returns_422(
+        self, dashboard_client: AsyncClient
+    ) -> None:
+        """An invalid source value returns HTTP 422."""
+        response = await dashboard_client.get(
+            "/api/dashboard/bans/by-jail?source=invalid"
+        )
+        assert response.status_code == 422
+
     async def test_empty_jails_response(self, dashboard_client: AsyncClient) -> None:
         """Empty jails list is serialised correctly."""
         from app.models.ban import BansByJailResponse