feat(paddleocr): add PaddleOCR OCR service (Docker images, server, tests, docs) and CI workflows

Dockerfile_paddleocr

@@ -1,6 +1,6 @@
 # PaddleOCR GPU Variant
 # OCR processing with NVIDIA GPU support using PaddlePaddle
-FROM paddlepaddle/paddle:3.0.0-gpu-cuda11.8-cudnn8.9-trt8.6
+FROM paddlepaddle/paddle:2.6.2-gpu-cuda11.7-cudnn8.4-trt8.4
 
 LABEL maintainer="Task Venture Capital GmbH <hello@task.vc>"
 LABEL description="PaddleOCR PP-OCRv4 - GPU optimized"
@@ -22,9 +22,9 @@ RUN apt-get update && apt-get install -y --no-install-recommends \
     curl \
     && rm -rf /var/lib/apt/lists/*
 
-# Install Python dependencies
+# Install Python dependencies (using stable paddleocr 2.x)
 RUN pip install --no-cache-dir \
-    paddleocr \
+    paddleocr==2.8.1 \
     fastapi \
     uvicorn[standard] \
     python-multipart \
@@ -36,10 +36,8 @@ COPY image_support_files/paddleocr_server.py /app/paddleocr_server.py
 COPY image_support_files/paddleocr-entrypoint.sh /usr/local/bin/paddleocr-entrypoint.sh
 RUN chmod +x /usr/local/bin/paddleocr-entrypoint.sh
 
-# Pre-download OCR models during build (PP-OCRv4)
-RUN python -c "from paddleocr import PaddleOCR; \
-    ocr = PaddleOCR(use_angle_cls=True, lang='en', use_gpu=False, show_log=True); \
-    print('English model downloaded')"
+# Note: OCR models will be downloaded on first run
+# This ensures compatibility across different GPU architectures
 
 # Expose API port
 EXPOSE 5000