fix(imports): remove redundant import of models_params in __main__.py for cleaner code

style(fallback_handler.py): format error message for better readability
style(test_llm.py): format exception assertion for better readability

ra_aid/__main__.py

@@ -8,7 +8,6 @@ from langgraph.checkpoint.memory import MemorySaver
 from rich.console import Console
 from rich.panel import Panel
 from rich.text import Text
-from ra_aid.models_params import models_params
 
 from ra_aid import print_error, print_stage_header
 from ra_aid.__version__ import __version__
@@ -29,7 +28,7 @@ from ra_aid.dependencies import check_dependencies
 from ra_aid.env import validate_environment
 from ra_aid.llm import initialize_llm
 from ra_aid.logging_config import get_logger, setup_logging
-from ra_aid.models_params import DEFAULT_TEMPERATURE
+from ra_aid.models_params import DEFAULT_TEMPERATURE, models_params
 from ra_aid.project_info import format_project_info, get_project_info
 from ra_aid.prompts import CHAT_PROMPT, WEB_RESEARCH_PROMPT_SECTION_CHAT
 from ra_aid.tool_configs import get_chat_tools

ra_aid/fallback_handler.py

@@ -349,7 +349,9 @@ class FallbackHandler:
         ):
             return self.current_tool_to_bind.invoke(arguments)
         else:
-            raise FallbackToolExecutionError(f"Tool '{name}' not found in available tools.")
+            raise FallbackToolExecutionError(
+                f"Tool '{name}' not found in available tools."
+            )
 
     def base_message_to_tool_call_dict(self, response: BaseMessage):
         """

tests/ra_aid/test_llm.py

@@ -237,7 +237,9 @@ def test_initialize_openai_compatible(clean_env, mock_openai):
 
 def test_initialize_unsupported_provider(clean_env):
     """Test initialization with unsupported provider raises ValueError"""
-    with pytest.raises(ValueError, match=r"Missing required environment variable for provider: unknown"):
+    with pytest.raises(
+        ValueError, match=r"Missing required environment variable for provider: unknown"
+    ):
         initialize_llm("unknown", "model")