fix: improve DPI handling in OCR service to support string values

Author: Bob Strahan

lib/idp_common_pkg/idp_common/ocr/service.py

@@ -98,9 +98,19 @@ def __init__(
 
             # Extract DPI from image configuration
             image_config = ocr_config.get("image", {})
-            self.dpi = image_config.get(
-                "dpi", 150
-            )  # Default to 150 DPI if not specified
+            dpi_value = image_config.get("dpi", 150)
+
+            # Convert DPI to integer if it's a string
+            if isinstance(dpi_value, str):
+                try:
+                    self.dpi = int(dpi_value) if dpi_value.strip() else 150
+                except (ValueError, AttributeError):
+                    logger.warning(
+                        f"Invalid DPI value '{dpi_value}', using default 150"
+                    )
+                    self.dpi = 150
+            else:
+                self.dpi = int(dpi_value) if dpi_value is not None else 150
 
             # Extract enhanced features
             features_config = ocr_config.get("features", [])