fix: add detailed logging for PaddleOCR model loading debug

Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>

paddleocr-service/main.py

@@ -21,9 +21,10 @@ API_KEY = os.environ.get("PADDLEOCR_API_KEY", "")
 def get_engine():
     global _engine
     if _engine is None:
+        logger.info("Importing paddleocr...")
         from paddleocr import PaddleOCR
 
-        logger.info("Loading PaddleOCR model...")
+        logger.info("Import done. Loading PaddleOCR model...")
         # PaddleOCR >= 3.x: lang="en" + PP-OCRv5; older: lang="latin"
         try:
             _engine = PaddleOCR(
@@ -33,7 +34,8 @@ def get_engine():
                 show_log=False,
             )
             logger.info("Using PP-OCRv5 (en)")
-        except Exception:
+        except Exception as e:
+            logger.info(f"PP-OCRv5 failed ({e}), trying latin fallback...")
             _engine = PaddleOCR(
                 lang="latin",
                 use_angle_cls=True,