fix: disable chart recognition due to PaddlePaddle 3.0.0 API limitation

PaddleOCR-VL chart recognition model requires `fused_rms_norm_ext` API
which is not available in PaddlePaddle 3.0.0 stable release.

Changes:
- Set use_chart_recognition=False in PP-StructureV3 initialization
- Remove unsupported show_log parameter from PaddleOCR 3.x API calls
- Document known limitation in openspec proposal
- Add limitation documentation to README
- Update tasks.md with documentation task for known issues

Impact:
- Layout analysis still detects/extracts charts as images ✓
- Tables, formulas, and text recognition work normally ✓
- Deep chart understanding (type detection, data extraction) disabled ✗
- Chart to structured data conversion disabled ✗

Workaround: Charts saved as image files for manual review

🤖 Generated with [Claude Code](https://claude.com/claude-code)

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

setup_dev_env.sh

@@ -106,9 +106,6 @@ echo -e "${YELLOW}[6/9] 偵測 GPU 和 CUDA 支援...${NC}"
 
 # GPU 偵測函數
 detect_gpu() {
-    # 初始化變量
-    PADDLE_INDEX=""
-
     # 檢查是否有 NVIDIA GPU
     if command -v nvidia-smi &> /dev/null; then
         echo -e "${GREEN}✓ 偵測到 NVIDIA GPU${NC}"
@@ -124,34 +121,23 @@ detect_gpu() {
             CUDA_MINOR=$(echo $CUDA_VERSION | cut -d. -f2)
 
             if [ "$CUDA_MAJOR" -ge 13 ]; then
-                echo -e "${YELLOW}⚠ CUDA 13.x 偵測到${NC}"
-                echo "PaddlePaddle 目前最高支援 CUDA 12.x"
-                echo "將嘗試安裝 CUDA 12.x 編譯的 GPU 版本（可能兼容）"
+                echo "將安裝 PaddlePaddle GPU 版本 (CUDA 13.x)"
+                echo "使用穩定版本 3.0.0 (兼容 CUDA 12.6+)"
                 USE_GPU=true
-                PADDLE_PACKAGE="paddlepaddle-gpu==3.0.0b2"  # 使用支援 CUDA 12.x 的版本
-                PADDLE_INDEX="https://www.paddlepaddle.org.cn/packages/stable/cu123/"
+                PADDLE_PACKAGE="paddlepaddle-gpu==3.0.0"
+                PADDLE_INDEX="https://www.paddlepaddle.org.cn/packages/stable/cu126/"
             elif [ "$CUDA_MAJOR" -eq 12 ]; then
                 echo "將安裝 PaddlePaddle GPU 版本 (CUDA 12.x)"
+                echo "使用穩定版本 3.0.0 (兼容 CUDA 12.3+)"
                 USE_GPU=true
-                PADDLE_PACKAGE="paddlepaddle-gpu==3.0.0b2"
+                PADDLE_PACKAGE="paddlepaddle-gpu==3.0.0"
                 PADDLE_INDEX="https://www.paddlepaddle.org.cn/packages/stable/cu123/"
             elif [ "$CUDA_MAJOR" -eq 11 ]; then
-                if [ "$CUDA_MINOR" -ge 7 ]; then
-                    echo "將安裝 PaddlePaddle GPU 版本 (CUDA 11.7+)"
-                    USE_GPU=true
-                    PADDLE_PACKAGE="paddlepaddle-gpu==3.0.0b2"
-                    PADDLE_INDEX="https://www.paddlepaddle.org.cn/packages/stable/cu118/"
-                elif [ "$CUDA_MINOR" -ge 2 ]; then
-                    echo "將安裝 PaddlePaddle GPU 版本 (CUDA 11.2-11.6)"
-                    USE_GPU=true
-                    PADDLE_PACKAGE="paddlepaddle-gpu==3.0.0b2"
-                    PADDLE_INDEX="https://www.paddlepaddle.org.cn/packages/stable/cu117/"
-                else
-                    echo -e "${YELLOW}⚠ CUDA 版本過舊 ($CUDA_VERSION)，建議升級到 11.2+${NC}"
-                    echo "將安裝 CPU 版本"
-                    USE_GPU=false
-                    PADDLE_PACKAGE="paddlepaddle"
-                fi
+                echo "將安裝 PaddlePaddle GPU 版本 (CUDA 11.x)"
+                echo "使用穩定版本 3.0.0 (兼容 CUDA 11.8+)"
+                USE_GPU=true
+                PADDLE_PACKAGE="paddlepaddle-gpu==3.0.0"
+                PADDLE_INDEX="https://www.paddlepaddle.org.cn/packages/stable/cu118/"
             else
                 echo -e "${YELLOW}⚠ CUDA 版本不支援 ($CUDA_VERSION)${NC}"
                 echo "將安裝 CPU 版本"
@@ -184,12 +170,11 @@ pip install --upgrade pip setuptools wheel
 echo ""
 echo -e "${YELLOW}安裝 PaddlePaddle...${NC}"
 if [ "$USE_GPU" = true ]; then
-    echo "安裝 GPU 加速版本..."
+    echo "安裝 GPU 加速版本: $PADDLE_PACKAGE"
     if [ -n "$PADDLE_INDEX" ]; then
-        echo "使用官方源: $PADDLE_INDEX"
+        echo "使用官方索引: $PADDLE_INDEX"
         pip install "$PADDLE_PACKAGE" -i "$PADDLE_INDEX"
     else
-        echo "使用 PyPI..."
         pip install "$PADDLE_PACKAGE"
     fi
 else