fix: resolve CI/CD issues - remove unused imports and fix type mismatches

pyproject.toml

@@ -45,7 +45,7 @@ dev = [
 ]
 
 [project.scripts]
-codegraph = "src.cli:main"
+codegraph = "src.cli.main:main"
 
 [tool.setuptools.packages.find]
 where = ["src"]
@@ -62,6 +62,7 @@ python_version = "3.9"
 warn_return_any = true
 warn_unused_configs = true
 ignore_missing_imports = true
+exclude = "src/confgen"
 
 [tool.black]
 line-length = 100