fix: Apply ruff formatting to deepagent.py

- Fixed code formatting issues in src/agents/deepagent.py using ruff format
- All 53 files now pass ruff format --check
- All 78 unit tests continue to pass
- mypy static analysis still passes (53 source files)
- ruff linting passes with no issues

Resolves static code analysis CI failure:
'Would reformat: src/agents/deepagent.py'

Author: vinod0m

src/agents/deepagent.py

@@ -172,7 +172,11 @@ def invoke(self, input_data: dict, config: dict):
             for tool in self.tools:
                 if tool.name == "DiagramParserTool":
                     # Extract file path from prompt (simple parsing)
-                    match = re.search(r"\'(.*?)\'", self.last_input) if self.last_input else None
+                    match = (
+                        re.search(r"\'(.*?)\'", self.last_input)
+                        if self.last_input
+                        else None
+                    )
                     if match:
                         file_path = match.group(1)
                         return {"output": tool._run(file_path)}