task-42: 限制采集解析的文件大小、最大行数和单 chunk 行数

新增 CollectDataParseLimits 组件并在 CollectDataService 解析/回传路径
接入：源文件大小（默认 50MB）、累计解析行数（默认 50000）、单 chunk
回传行数（默认 5000）超限即拒绝，配置经 aiimage.collect-data.* 环境变量
可调、0/负值回退默认。8 个用例覆盖正常/批量/幂等/空/单元素/边界超限/
非法配置/失败后可恢复路径，mvn 全量测试通过。

backend-java/src/main/resources/application.yml

@@ -255,6 +255,12 @@ aiimage:
     coze-include-legacy-api-key: ${AIIMAGE_SIMILAR_ASIN_COZE_INCLUDE_LEGACY_API_KEY:true}
     coze-use-legacy-item-field-order: ${AIIMAGE_SIMILAR_ASIN_COZE_USE_LEGACY_ITEM_ORDER:false}
     coze-result-buffer-enabled: ${AIIMAGE_SIMILAR_ASIN_COZE_RESULT_BUFFER_ENABLED:true}
+  collect-data:
+    stale-timeout-minutes: ${AIIMAGE_COLLECT_DATA_STALE_TIMEOUT_MINUTES:30}
+    stale-check-cron: ${AIIMAGE_COLLECT_DATA_STALE_CHECK_CRON:*/30 * * * * *}
+    max-source-file-bytes: ${AIIMAGE_COLLECT_DATA_MAX_SOURCE_FILE_BYTES:0}
+    max-parse-rows: ${AIIMAGE_COLLECT_DATA_MAX_PARSE_ROWS:0}
+    max-chunk-rows: ${AIIMAGE_COLLECT_DATA_MAX_CHUNK_ROWS:0}
   image-video:
     coze-base-url: ${AIIMAGE_IMAGE_VIDEO_COZE_BASE_URL:https://api.coze.cn}
     coze-token: ${AIIMAGE_IMAGE_VIDEO_COZE_TOKEN:sat_Ws4VB1caOPasDivpKIvtOySYx3lhKgQ95H3crIh0tBwiNYtPTyi6bqe0pBaRzpVu}