fix(providers): omit temperature for sonnet 5

Add sonnet-5 to the Anthropic omit-temperature model families and cover adaptive, enabled, and non-thinking request paths.

Fixes #4683

nanobot/providers/anthropic_provider.py

@@ -545,10 +545,12 @@ class AnthropicProvider(LLMProvider):
         max_tokens = max(1, max_tokens)
         thinking_enabled = bool(reasoning_effort) and reasoning_effort.lower() != "none"
 
-        # Several Anthropic models (opus-4-7, opus-4-8, fable) deprecated the
+        # Several Anthropic models (opus-4-7, opus-4-8, sonnet-5, fable) deprecated the
         # `temperature` parameter — the API returns 400 if it is present.
         _model_lower = model_name.lower()
-        omit_temperature = any(m in _model_lower for m in ("opus-4-7", "opus-4-8", "fable"))
+        omit_temperature = any(
+            m in _model_lower for m in ("opus-4-7", "opus-4-8", "sonnet-5", "fable")
+        )
 
         kwargs: dict[str, Any] = {
             "model": model_name,