fix(imports): resolve flake8 E402 import order issues

Move core API imports to top of file to comply with PEP8 import ordering.
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Co-Authored-By: Claude <noreply@anthropic.com>

Author: sidmohan0

datafog/__init__.py

@@ -10,6 +10,9 @@
 
 from .__about__ import __version__
 
+# Import core API functions
+from .core import anonymize_text, detect_pii, get_supported_entities, scan_text
+
 # Core imports - always available
 from .models.annotator import AnnotationResult, AnnotatorRequest
 from .models.anonymizer import (
@@ -77,9 +80,6 @@ def _missing_dependency(*args, **kwargs):
     "SparkService", "datafog.services.spark_service", "distributed"
 )
 
-# Import core API functions
-from .core import anonymize_text, detect_pii, get_supported_entities, scan_text
-
 
 # Simple API for core functionality (backward compatibility)
 def detect(text: str) -> list: