Adding the new rewrite

app/rate_limit.py

@@ -0,0 +1,27 @@
+"""Rate limiting via slowapi with Redis-backed storage."""
+from __future__ import annotations
+
+from slowapi import Limiter
+from slowapi.util import get_remote_address
+
+from .settings import settings
+
+
+def _enabled_swallow(f):
+    """Return original limiter decorator or a no-op when rate limiting disabled."""
+    if settings.rate_limit_enabled:
+        return f
+
+    def _noop(*args, **kwargs):
+        def wrapper(fn):
+            return fn
+        return wrapper
+    return _noop
+
+
+limiter = Limiter(
+    key_func=get_remote_address,
+    storage_uri=settings.redis_url,
+    enabled=settings.rate_limit_enabled,
+    default_limits=[],
+)