Add o3-pro model support and extend test coverage

- Added o3-pro model configuration to custom_models.json with 200K context
- Updated OpenAI provider to support o3-pro with fixed temperature constraint
- Extended simulator tests to include o3-pro validation scenarios

🤖 Generated with [Claude Code](https://claude.ai/code)

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

providers/openai.py

@@ -22,6 +22,10 @@ class OpenAIModelProvider(OpenAICompatibleProvider):
             "context_window": 200_000,  # 200K tokens
             "supports_extended_thinking": False,
         },
+        "o3-pro": {
+            "context_window": 200_000,  # 200K tokens
+            "supports_extended_thinking": False,
+        },
         "o4-mini": {
             "context_window": 200_000,  # 200K tokens
             "supports_extended_thinking": False,
@@ -54,8 +58,13 @@ class OpenAIModelProvider(OpenAICompatibleProvider):
         config = self.SUPPORTED_MODELS[resolved_name]
 
         # Define temperature constraints per model
+<<<<<<< HEAD
         if resolved_name in ["o3", "o3-mini", "o4-mini", "o4-mini-high"]:
             # O3 and O4 reasoning models only support temperature=1.0
+=======
+        if model_name in ["o3", "o3-mini", "o3-pro"]:
+            # O3 models only support temperature=1.0
+>>>>>>> 155c4ec (Add o3-pro model support and extend test coverage)
             temp_constraint = FixedTemperatureConstraint(1.0)
         else:
             # Other OpenAI models support 0.0-2.0 range