Add claude-opus-4-5 and claude-opus-4-6 to ANTHROPIC_MODELS

Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>

Author: abhay-sheshadri

safetytooling/apis/inference/anthropic.py

@@ -29,6 +29,8 @@
     "claude-3-7-sonnet-20250219",
     "claude-opus-4-1-20250805",
     "claude-opus-4-20250514",
+    "claude-opus-4-5-20251101",
+    "claude-opus-4-6",
     "claude-sonnet-4-20250514",
     "claude-sonnet-4-5-20250929",
     "claude-haiku-4-5",