fix python package distrubution name case-sensitive issue in client span code attr… (#546)

…ibutes

### Issue

When Django ORM triggers a database query and generates corresponding
OTel client span, the client span contains wrong code attributes:
```
  "code.function.name": "django.db.backends.utils.CursorDebugWrapper._execute",
  "code.file.path": "/usr/local/lib/python3.10/site-packages/django/db/backends/utils.py",
  "db.query.text": "SELECT \"billing_service_billing\".\"id\", \"billing_service_billing\".\"owner_id\", \"billing_service_billing\".\"type\", \"billing_service_billing\".\"type_name\", \"billing_service_billing\".\"pet_id\", \"billing_service_billing\".\"payment\", \"billing_service_billing\".\"status\" FROM \"billing_service_billing\" WHERE NOT (\"billing_service_billing\".\"type_name\" IN (SELECT DISTINCT U0.\"invalid_name\" AS \"invalid_name\" FROM \"check_list\" U0 LIMIT 100)) LIMIT 3810",
```

Function name `django.db.backends.utils.CursorDebugWrapper._execute` and
file path
`/usr/local/lib/python3.10/site-packages/django/db/backends/utils.py`
are from Django, not user code.

### Description of changes
The root cause is django distribute name is
`Django`(Distribution(name='Django', version='5.2.7')), does not match
with the package name `django`.
The bug can be fixed by using a case-insensitive string comparison.

### Testing
After fix:
```
"attributes": {
        "code.function.name": "views.orm_example_view",
        "code.file.path": "/Volumes/workplace/extension/aws-otel-python-instrumentation/samples/django/views.py",
        "code.line.number": 278,
        "db.system": "sqlite",
        "db.name": "",
        "db.statement": "SELECT \"auth_user\".\"id\", \"auth_user\".\"password\", \"auth_user\".\"last_login\", \"auth_user\".\"is_superuser\", \"auth_user\".\"username\", \"auth_user\".\"first_name\", \"auth_user\".\"last_name\", \"auth_user\".\"email\", \"auth_user\".\"is_staff\", \"auth_user\".\"is_active\", \"auth_user\".\"date_joined\" FROM \"auth_user\" WHERE \"auth_user\".\"is_active\" LIMIT 10"
    },
```


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choice.

Author: wangzlei

aws-opentelemetry-distro/src/amazon/opentelemetry/distro/code_correlation/internal/packages_resolver.py

@@ -364,7 +364,8 @@ def is_third_party_package(file_path: Path) -> bool:
         return False
 
     third_party_packages = _load_third_party_packages()
-    return distribution.name in third_party_packages
+    # Perform case-insensitive comparison to handle packages like 'Django' vs 'django'
+    return distribution.name.lower() in third_party_packages
 
 
 @lru_cache(maxsize=1024)

aws-opentelemetry-distro/tests/amazon/opentelemetry/distro/code_correlation/internal/test_packages_resolver.py

@@ -577,6 +577,18 @@ def test_is_third_party_package_not_in_list(self, mock_load_packages, mock_resol
 
         self.assertFalse(result)
 
+    @patch("amazon.opentelemetry.distro.code_correlation.internal.packages_resolver.resolve_package_from_filename")
+    @patch("amazon.opentelemetry.distro.code_correlation.internal.packages_resolver._load_third_party_packages")
+    def test_is_third_party_package_case_insensitive_match(self, mock_load_packages, mock_resolve):
+        """Test case-insensitive detection of third-party package."""
+        # Test with uppercase package name in distribution but lowercase in third-party list
+        mock_resolve.return_value = Distribution(name="Django", version="4.2.0")
+        mock_load_packages.return_value = {"django", "requests", "urllib3"}
+
+        result = is_third_party_package(Path("/path/to/Django/__init__.py"))
+
+        self.assertTrue(result)
+
 
 class TestIsUserCode(TestCase):
     """Test the is_user_code function."""