fix: catch all exceptions in PaddleOCR version fallback

PaddleOCR 2.8.1 throws a generic Exception (not ValueError) when
ocr_version='PP-OCRv5' is used. Broadened except clause to catch
any error and fall back to lang='latin' for older versions.

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

paddleocr-service/main.py

@@ -24,7 +24,7 @@ def get_engine():
         from paddleocr import PaddleOCR
 
         logger.info("Loading PaddleOCR model...")
-        # PaddleOCR >= 3.x: use ocr_version param; fallback for older API
+        # PaddleOCR >= 3.x: lang="en" + PP-OCRv5; older: lang="latin"
         try:
             _engine = PaddleOCR(
                 lang="en",
@@ -32,12 +32,14 @@ def get_engine():
                 use_angle_cls=True,
                 show_log=False,
             )
-        except (ValueError, TypeError):
+            logger.info("Using PP-OCRv5 (en)")
+        except Exception:
             _engine = PaddleOCR(
                 lang="latin",
                 use_angle_cls=True,
                 show_log=False,
             )
+            logger.info("Using PP-OCRv4 fallback (latin)")
         logger.info("PaddleOCR model loaded successfully")
     return _engine