fix(sql+api): fix view column mismatches and ClickHouse 24.8 JOIN issue

- view_form_bruteforce_detected: add post_count, distinct_paths, first_seen, last_seen
- view_host_ip_ja4_rotation: add host, distinct_ja4, ja4_list, window_start
- Replace uniqExact/groupUniqArray with count()/groupArray (no nested-agg error)
- api.py campaigns/graph: move a.src_ip < b.src_ip from JOIN ON to WHERE
  (ClickHouse 24.8 forbids cross-table inequality in JOIN ON condition)

Co-authored-by: Copilot <223556219+Copilot@users.noreply.github.com>

services/dashboard/backend/routes/api.py

@@ -972,8 +972,8 @@ async def campaigns_graph() -> dict[str, Any]:
             f"FROM {_DB}.ml_detected_anomalies a "
             f"INNER JOIN {_DB}.ml_detected_anomalies b "
             "ON a.ja4 = b.ja4 AND a.campaign_id = b.campaign_id "
-            "AND a.src_ip < b.src_ip "
             "WHERE a.campaign_id >= 0 "
+            "AND a.src_ip < b.src_ip "
             "AND a.detected_at >= now() - INTERVAL 7 DAY "
             "AND b.detected_at >= now() - INTERVAL 7 DAY "
             "LIMIT 2000"