fix: correct CampaignsView, analysis.py IPv4 split, entities date filter

- CampaignsView: update ClusterData interface to match real API response
  (severity/unique_ips/score instead of threat_level/total_ips/confidence_range)
  Fix fetch to use data.items, rewrite ClusterCard and BehavioralTab
  Remove unused getClassificationColor and THREAT_ORDER constants
- analysis.py: fix IPv4Address object has no attribute 'split' on line 322
  Add str() conversion before calling .split('.')
- entities.py: fix Date vs DateTime comparison — log_date is a Date column,
  comparing against now()-INTERVAL HOUR caused yesterday's entries to be excluded
  Use toDate(now() - INTERVAL X HOUR) for correct Date-level comparison

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

backend/routes/analysis.py

@@ -318,7 +318,7 @@ async def analyze_ja4(ip: str):
         from collections import defaultdict
         subnet_counts = defaultdict(int)
         for row in subnets_result.result_rows:
-            ip_addr = row[0]
+            ip_addr = str(row[0])
             parts = ip_addr.split('.')
             if len(parts) == 4:
                 subnet = f"{parts[0]}.{parts[1]}.{parts[2]}.0/24"