fix: remove warmup OCR call — causes OOM on 6G container

The warmup OCR call during startup pushes memory over 6G and causes
OOM kills + restart loops. First real OCR request will be slow
(JIT compilation) but container stays stable.

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

paddleocr-service/main.py

@@ -48,13 +48,6 @@ def _load_model():
                 logger.info(f"PaddleOCR init strategy {i} failed: {e}")
         else:
             raise RuntimeError("All PaddleOCR init strategies failed")
-        # Warmup: run a dummy OCR to trigger JIT compilation
-        # Without this, the first real request takes minutes on CPU
-        logger.info("Running warmup OCR (JIT compilation)...")
-        dummy = np.ones((50, 200, 3), dtype=np.uint8) * 255
-        _engine.ocr(dummy)
-        logger.info("Warmup complete")
-
         _ready = True
         logger.info("PaddleOCR model loaded successfully — ready to serve")
     except Exception as e: