feat(imperva): new Imperva Cloud WAF integration

Cloud Application Security API v1, 5 commands: list sites, get site status,
block/whitelist IPs (site ACL). API-ID/key auth, stdlib-only.

Co-Authored-By: Claude Opus 4.8 (1M context) <noreply@anthropic.com>

integrations/imperva/scripts/whitelist_ips.py

@@ -0,0 +1,52 @@
+import json, os, sys, urllib.parse, urllib.request, urllib.error
+
+BASE = "https://my.imperva.com/api/prov/v1"
+
+
+def _cfg():
+    return json.loads(os.environ.get("INTEGRATION_SECRETS", "{}"))
+
+
+def _inputs():
+    return json.loads(os.environ.get("INTEGRATION_INPUTS", "{}"))
+
+
+def post(path, cfg, fields=None):
+    body = {"api_id": str(cfg.get("api_id", "")), "api_key": str(cfg.get("api_key", ""))}
+    if fields:
+        body.update({k: v for k, v in fields.items() if v not in (None, "")})
+    data = urllib.parse.urlencode(body).encode("utf-8")
+    req = urllib.request.Request(BASE + path, data=data,
+                                 headers={"Content-Type": "application/x-www-form-urlencoded",
+                                          "Accept": "application/json"}, method="POST")
+    with urllib.request.urlopen(req, timeout=60) as r:
+        raw = r.read()
+        return json.loads(raw) if raw else {}
+
+
+def _run(fn):
+    try:
+        print(json.dumps(fn(_cfg(), _inputs())))
+    except urllib.error.HTTPError as e:
+        print(json.dumps({"error": "HTTP " + str(e.code), "detail": e.read().decode("utf-8", "replace")}))
+        sys.exit(1)
+    except Exception as e:
+        print(json.dumps({"error": str(e)}))
+        sys.exit(1)
+
+
+def main(cfg, inputs):
+    site_id = inputs.get("site_id")
+    if not site_id:
+        raise Exception("site_id is required")
+    ips = inputs.get("ips")
+    if not ips:
+        raise Exception("ips is required")
+    return post("/sites/configure/acl", cfg, {
+        "site_id": site_id,
+        "rule_id": "api.acl.whitelisted_ips",
+        "ips": ips,
+    })
+
+
+_run(main)