feat: sync version-driven intel coverage

scripts/intel/http_client.py

@@ -151,6 +151,16 @@ def _release_inflight(cache_key: str) -> None:
         event.set()
 
 
+def _retry_delay_seconds(response: requests.Response, *, attempt: int, backoff_seconds: float) -> float:
+    retry_after = response.headers.get("Retry-After")
+    if retry_after:
+        try:
+            return max(backoff_seconds * attempt, min(15.0, float(retry_after) * attempt))
+        except ValueError:
+            pass
+    return backoff_seconds * attempt
+
+
 def build_session(source: Dict[str, Any] | None = None) -> requests.Session:
     session = requests.Session()
     session.trust_env = True
@@ -220,6 +230,12 @@ def request(
                     verify=verify,
                     **kwargs,
                 )
+                if response.status_code == 429 and attempt < status_retries:
+                    time.sleep(_retry_delay_seconds(response, attempt=attempt, backoff_seconds=backoff_seconds))
+                    continue
+                if 500 <= response.status_code < 600 and attempt < status_retries:
+                    time.sleep(backoff_seconds * attempt)
+                    continue
                 if cacheable and response.ok:
                     _write_cached_response(cache_key, response)
                 return response