Sync upstream features; preserve fork KV scanner, parsers, verifier

Brought in 35 upstream commits (MITRE heatmap, health score, dependency map,
PowerQuery playground, onboarding tracker, product grouping, modern UI redesign).

Preserved fork additions:
  backend/routers/quality.py  KV scanner, pattern refs, JS keys, JSON mode,
                              /parsers + /sync-from-sdl endpoints
  parsers/                    96 OCSF + tenant parsers
  tools/stormshield-verify/   end-to-end ingest regression test
  .gitignore                  un-ignored parsers/*
  CHANGES.md, PATCHES.md

parsers/f5_networks_logs-latest

@@ -0,0 +1,26 @@
+{
+  attributes: {
+    class_uid: "5002",
+    category_uid: "4",
+    severity_id: "0",
+    class_name: "F5 Web Traffic",
+    category_name: "F5 HTTP Access Logs",
+    "metadata.product.name": "F5 BIG-IP",
+    "metadata.product.vendor_name": "F5 Networks",
+    "dataSource.category": "network",
+    "dataSource.name": "F5 BIG-IP",
+    "dataSource.vendor": "F5"
+  },
+  patterns: {
+    timestamp: "\\d{4}/\\d{2}/\\d{2}\\s+\\d{2}:\\d{2}:\\d{2}",
+    ipv4: "(?:\\d{1,3}\\.){3}\\d{1,3}",
+    quote: "\"[^\"]*\"",
+    number: "\\d+"
+  },
+  formats: [
+    {
+      format: ".*$_=identifier$=$_$(?:\\,|\\r)",
+      repeat: true
+    }
+  ]
+}