Handle SpacetimeDB migration imports with chunked uploads

jenkins/Jenkinsfile.database-import

@@ -16,6 +16,7 @@ pipeline {
     string(name: 'ROOT_DIR', defaultValue: '', description: 'spacetime CLI root-dir，可选，优先于 DEPLOY_DIRECTORY')
     string(name: 'INPUT_FILE', defaultValue: '', description: '必填，迁移 JSON 文件路径，相对源码根目录或绝对路径')
     string(name: 'INCLUDE_TABLES', defaultValue: '', description: '可选，逗号分隔的表名白名单')
+    string(name: 'CHUNK_SIZE', defaultValue: '524288', description: '迁移 JSON 分片大小，默认 512KiB，用于规避 SpacetimeDB HTTP 413')
     booleanParam(name: 'DRY_RUN', defaultValue: true, description: '仅校验导入，不写入数据')
     booleanParam(name: 'INCREMENTAL', defaultValue: true, description: '增量导入，跳过已存在或冲突的行')
     booleanParam(name: 'REPLACE_EXISTING', defaultValue: false, description: '覆盖本次文件内涉及的表，不可与 INCREMENTAL 同时启用')
@@ -80,6 +81,9 @@ pipeline {
               if [[ -n "${params.INCLUDE_TABLES}" ]]; then
                 args+=(--include "${params.INCLUDE_TABLES}")
               fi
+              if [[ -n "${params.CHUNK_SIZE}" ]]; then
+                args+=(--chunk-size "${params.CHUNK_SIZE}")
+              fi
               if [[ "${params.DRY_RUN}" == "true" ]]; then
                 args+=(--dry-run)
               fi