feat(waf): Alerts — Regelübereinstimmungen in DB + UI — v1.2.77

- Migration 0038: waf_alerts-Tabelle
- AlertWriter (Buffered-Channel → async DB-Write)
- SPOE: MatchedRules → sendAlert() nach ProcessRequestHeaders()
- API: GET /waf/alerts + DELETE /waf/alerts
- WAF-Page: Tabs Domains | Alarme; Alarme-Tabelle mit Rule-ID,
  Severity, Aktion (Detected/Blocked), URI, Client-IP + Purge-Button

Co-Authored-By: Claude Sonnet 4.6 <noreply@anthropic.com>

management-ui/src/i18n/locales/en/common.json

@@ -1800,6 +1800,30 @@
       "customRulesHint": "Raw SecRule directives appended after the CRS. Applied last, can override CRS rules.",
       "defaultHint": "Default: Detection-Only, Paranoia Level 1. Switch to Blocking only after reviewing alerts.",
       "saveFailed": "Failed to save WAF configuration."
+    },
+    "tabs": {
+      "domains": "Domains",
+      "alerts": "Alerts"
+    },
+    "alerts": {
+      "total": "entries",
+      "empty": "No WAF alerts yet. Rules matched will appear here.",
+      "purge30d": "Purge > 30 days",
+      "purgeConfirm": "Delete all alerts older than 30 days?",
+      "purged": "Alerts purged.",
+      "blocked": "Blocked",
+      "detected": "Detected",
+      "col": {
+        "time": "Time",
+        "action": "Action",
+        "hostname": "Domain",
+        "clientIp": "Client IP",
+        "method": "Method",
+        "uri": "URI",
+        "ruleId": "Rule ID",
+        "severity": "Severity",
+        "msg": "Message"
+      }
     }
   }
 }