fix(cmake): abort failed Paddle bootstrap steps

Stop configuration before extraction, cleanup, or cache mutation when the Paddle download fails integrity or transport checks. Also fail on extraction errors and unpack into the configured build directory.

Coding-Agent: Codex
Codex-Version: codex-cli 0.144.6
Model: gpt-5.6-sol
Reasoning-Effort: xhigh

Author: njzjz-bot

source/CMakeLists.txt

@@ -84,11 +84,33 @@ if(ENABLE_PADDLE)
     endif()
     set(TGZ_FILE "${CMAKE_BINARY_DIR}/paddle_inference.tgz")
     set(EXTRACTED_DIR "${CMAKE_BINARY_DIR}/paddle_inference_install_dir")
-    file(DOWNLOAD ${DOWNLOAD_URL} ${TGZ_FILE}
-         EXPECTED_HASH SHA256=${DOWNLOAD_SHA256})
+    file(
+      DOWNLOAD ${DOWNLOAD_URL} ${TGZ_FILE}
+      EXPECTED_HASH SHA256=${DOWNLOAD_SHA256}
+      STATUS PADDLE_DOWNLOAD_STATUS)
+    list(GET PADDLE_DOWNLOAD_STATUS 0 PADDLE_DOWNLOAD_STATUS_CODE)
+    list(GET PADDLE_DOWNLOAD_STATUS 1 PADDLE_DOWNLOAD_STATUS_MESSAGE)
+    if(NOT PADDLE_DOWNLOAD_STATUS_CODE EQUAL 0)
+      message(
+        FATAL_ERROR
+          "Failed to download Paddle inference library from ${DOWNLOAD_URL} (status ${PADDLE_DOWNLOAD_STATUS_CODE}): ${PADDLE_DOWNLOAD_STATUS_MESSAGE}"
+      )
+    endif()
     message(STATUS "Downloading finished, extracting...")
-    execute_process(COMMAND ${CMAKE_COMMAND} -E tar -xzvf ${TGZ_FILE}
-                    OUTPUT_QUIET)
+    execute_process(
+      COMMAND ${CMAKE_COMMAND} -E tar -xzvf ${TGZ_FILE}
+      OUTPUT_QUIET
+      ERROR_VARIABLE PADDLE_EXTRACT_ERROR
+      RESULT_VARIABLE PADDLE_EXTRACT_STATUS
+      WORKING_DIRECTORY "${CMAKE_BINARY_DIR}")
+    if(NOT PADDLE_EXTRACT_STATUS STREQUAL "0")
+      message(
+        FATAL_ERROR
+          "Failed to extract ${TGZ_FILE} (status ${PADDLE_EXTRACT_STATUS}): ${PADDLE_EXTRACT_ERROR}"
+      )
+    endif()
+    # Cache the inferred location only after both steps succeed. Otherwise a
+    # failed configure would cause retries to skip this download block.
     file(REMOVE ${TGZ_FILE})
     set(PADDLE_INFERENCE_DIR
         ${EXTRACTED_DIR}