fix: update PaddleOCR init for v3.4+ API (lang=en, ocr_version=PP-OCRv5)

PaddleOCR 3.4.0 removed 'latin' language support. Use 'en' with
explicit ocr_version='PP-OCRv5' instead, with fallback for older API.

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

paddleocr-service/main.py

@@ -18,11 +18,20 @@ def get_engine():
     if _engine is None:
         from paddleocr import PaddleOCR
 
-        _engine = PaddleOCR(
-            lang="latin",
-            use_angle_cls=True,
-            show_log=False,
-        )
+        # PaddleOCR >= 3.x: use ocr_version param; fallback for older API
+        try:
+            _engine = PaddleOCR(
+                lang="en",
+                ocr_version="PP-OCRv5",
+                use_angle_cls=True,
+                show_log=False,
+            )
+        except (ValueError, TypeError):
+            _engine = PaddleOCR(
+                lang="latin",
+                use_angle_cls=True,
+                show_log=False,
+            )
     return _engine