feat(virustotal): complete v3 command coverage (script-based)

Expand the VirusTotal integration from 3 form-based commands to 15 script-based
commands covering the v3 API: ip/domain/file/url reputation (existing
get_ip_report/get_domain_report ids preserved), file rescan, URL scan,
analysis-get, intelligence search, file sandbox (behaviour) report, passive DNS,
and comments get/add/get-by-id/delete. Scripts handle URL base64 ids,
form-encoded URL submission and comment resource routing.

File-content upload (file-scan) and private scanning are intentionally omitted:
they require an XSOAR-style war-room file entry system Riposte does not have.

Co-Authored-By: Claude Opus 4.8 <noreply@anthropic.com>

integrations/virustotal/scripts/test_connection.py

@@ -0,0 +1,33 @@
+import json, os, sys, urllib.request, urllib.parse, urllib.error
+
+
+def _cfg():
+    s = json.loads(os.environ.get("INTEGRATION_SECRETS", "{}"))
+    base = str(s.get("base_url") or "https://www.virustotal.com/api/v3").rstrip("/")
+    headers = {"x-apikey": s.get("api_key", ""), "Accept": "application/json"}
+    return base, headers
+
+
+def request(path):
+    base, headers = _cfg()
+    req = urllib.request.Request(base + "/" + path.lstrip("/"), headers=headers, method="GET")
+    with urllib.request.urlopen(req, timeout=60) as r:
+        raw = r.read()
+        return json.loads(raw) if raw else {}
+
+
+def run():
+    request("ip_addresses/8.8.8.8")
+    print(json.dumps({"ok": True}))
+
+
+try:
+    run()
+except urllib.error.HTTPError as e:
+    detail = e.read().decode("utf-8", "replace")
+    msg = "API key is not valid." if e.code in (401, 403) else "HTTP " + str(e.code)
+    print(json.dumps({"ok": False, "error": msg, "detail": detail}))
+    sys.exit(1)
+except Exception as e:
+    print(json.dumps({"ok": False, "error": str(e)}))
+    sys.exit(1)