Change NVX disable message from RuntimeWarning to info logging

When users explicitly disable NVX via AUTOBAHN_USE_NVX=0 (a valid
configuration choice), they were getting a noisy RuntimeWarning on
every import. This is not a warning condition - it's informational
feedback about their intentional configuration.

Changed from warnings.warn(RuntimeWarning) to log.info() so users
can still see the message if they configure logging to show info
level, but it won't be noisy by default.

Fixes #1737

Author: oberstet

autobahn/websocket/__init__.py

@@ -24,9 +24,12 @@
 #
 ###############################################################################
 
+import logging
 import os
 import warnings
 
+log = logging.getLogger(__name__)
+
 # ============================================================================
 # NVX (Native Vector Extensions) Runtime Configuration
 # ============================================================================
@@ -107,11 +110,9 @@
 
 if explicit_disable and HAS_NVX:
     # Case 4: NVX available but user explicitly disabled it at runtime
-    warnings.warn(
+    log.info(
         "NVX native acceleration is available but explicitly disabled via "
-        "AUTOBAHN_USE_NVX=0. Falling back to pure Python implementations.",
-        RuntimeWarning,
-        stacklevel=2,
+        "AUTOBAHN_USE_NVX=0. Falling back to pure Python implementations."
     )
     USES_NVX = False
 else: