fix: resolve CI/CD test failures and linting issues

tests/test_converters/test_yaml.py

@@ -3,7 +3,7 @@
 import pytest
 import tempfile
 import os
-from pathlib import Path
+import yaml
 
 from config_convert.converters import YAMLConverter
 
@@ -20,9 +20,9 @@ class TestYAMLConverter:
 
     def test_loads_nested_yaml(self, converter):
         data = """database:
-   host: localhost
-   port: 5432
- """
+  host: localhost
+  port: 5432
+"""
         result = converter.loads(data)
         assert result == {"database": {"host": "localhost", "port": 5432}}
 
@@ -33,9 +33,9 @@ class TestYAMLConverter:
 
     def test_loads_multiline_string(self, converter):
         data = """description: |
-   This is a
-   multiline string
- """
+  This is a
+  multiline string
+"""
         result = converter.loads(data)
         assert result["description"] == "This is a\nmultiline string\n"
 
@@ -56,7 +56,6 @@ class TestYAMLConverter:
         assert loaded == original
 
     def test_load_file(self, converter, temp_file, sample_yaml):
-        import yaml
         gen = temp_file(sample_yaml, suffix=".yaml")
         path = next(gen)
         try:
@@ -66,8 +65,6 @@ class TestYAMLConverter:
             os.unlink(path)
 
     def test_dump_file(self, converter, temp_dir, sample_yaml):
-        import yaml
-        import shutil
         path = tempfile.mktemp(suffix=".yaml")
         try:
             data = yaml.safe_load(sample_yaml)
@@ -75,7 +72,7 @@ class TestYAMLConverter:
             result = converter.load(path)
             assert result == data
         finally:
-            if Path(path).exists():
+            if os.path.exists(path):
                 os.unlink(path)
 
     def test_invalid_yaml_raises(self, converter):