feat: 重构数据中枢工作台与接入管理

- 新增统一的数据源、目录、纳管表与 Excel 处理后端能力

- 重建管理端数据中枢工作台并替换旧表管理页面

- 补充数据中枢迁移脚本、连接器底座与说明字段支持

easyflow-modules/easyflow-module-datacenter/src/main/java/tech/easyflow/datacenter/integration/AssistantDatacenterBridge.java

@@ -0,0 +1,7 @@
+package tech.easyflow.datacenter.integration;
+
+import tech.easyflow.datacenter.execution.model.DatacenterQueryRequest;
+
+public interface AssistantDatacenterBridge {
+    AssistantDatacenterResult queryPage(DatacenterQueryRequest request);
+}

easyflow-modules/easyflow-module-datacenter/src/main/java/tech/easyflow/datacenter/integration/AssistantDatacenterResult.java

@@ -0,0 +1,34 @@
+package tech.easyflow.datacenter.integration;
+
+import com.mybatisflex.core.row.Row;
+import tech.easyflow.datacenter.entity.DatacenterTable;
+import tech.easyflow.datacenter.meta.entity.DatacenterCatalog;
+import tech.easyflow.datacenter.meta.entity.DatacenterDatasetVersion;
+import tech.easyflow.datacenter.meta.entity.DatacenterSource;
+
+import java.util.ArrayList;
+import java.util.LinkedHashMap;
+import java.util.List;
+import java.util.Map;
+
+public class AssistantDatacenterResult {
+    private List<Row> rows = new ArrayList<>();
+    private DatacenterSource source;
+    private DatacenterCatalog catalog;
+    private DatacenterTable table;
+    private DatacenterDatasetVersion version;
+    private Map<String, Object> querySummary = new LinkedHashMap<>();
+
+    public List<Row> getRows() { return rows; }
+    public void setRows(List<Row> rows) { this.rows = rows; }
+    public DatacenterSource getSource() { return source; }
+    public void setSource(DatacenterSource source) { this.source = source; }
+    public DatacenterCatalog getCatalog() { return catalog; }
+    public void setCatalog(DatacenterCatalog catalog) { this.catalog = catalog; }
+    public DatacenterTable getTable() { return table; }
+    public void setTable(DatacenterTable table) { this.table = table; }
+    public DatacenterDatasetVersion getVersion() { return version; }
+    public void setVersion(DatacenterDatasetVersion version) { this.version = version; }
+    public Map<String, Object> getQuerySummary() { return querySummary; }
+    public void setQuerySummary(Map<String, Object> querySummary) { this.querySummary = querySummary; }
+}

easyflow-modules/easyflow-module-datacenter/src/main/java/tech/easyflow/datacenter/integration/DefaultAssistantDatacenterBridge.java

@@ -0,0 +1,49 @@
+package tech.easyflow.datacenter.integration;
+
+import org.springframework.stereotype.Component;
+import tech.easyflow.datacenter.execution.model.DatacenterQueryRequest;
+import tech.easyflow.datacenter.execution.model.DatacenterSchemaResponse;
+import tech.easyflow.datacenter.execution.service.DatacenterDatasetQueryService;
+import tech.easyflow.datacenter.meta.entity.DatacenterDatasetVersion;
+
+import javax.annotation.Resource;
+import java.util.LinkedHashMap;
+import java.util.List;
+
+@Component
+public class DefaultAssistantDatacenterBridge implements AssistantDatacenterBridge {
+
+    @Resource
+    private DatacenterDatasetQueryService queryService;
+
+    @Override
+    public AssistantDatacenterResult queryPage(DatacenterQueryRequest request) {
+        var page = queryService.queryPage(request);
+        DatacenterSchemaResponse schema = queryService.getSchema(request.getDatasetRef());
+        AssistantDatacenterResult result = new AssistantDatacenterResult();
+        result.setRows(page.getRecords());
+        result.setSource(schema.getSource());
+        result.setCatalog(schema.getCatalog());
+        result.setTable(schema.getTable());
+        result.setVersion(resolveVersion(schema.getVersions(), request == null || request.getDatasetRef() == null ? null : request.getDatasetRef().getVersionId()));
+        result.setQuerySummary(new LinkedHashMap<>() {{
+            put("pageNumber", page.getPageNumber());
+            put("pageSize", page.getPageSize());
+            put("totalRows", page.getTotalRow());
+            put("selectedColumns", request == null ? List.of() : request.getSelectedColumns());
+            put("filterCount", request == null || request.getFilters() == null ? 0 : request.getFilters().size());
+            put("sortCount", request == null || request.getSorts() == null ? 0 : request.getSorts().size());
+        }});
+        return result;
+    }
+
+    private DatacenterDatasetVersion resolveVersion(List<DatacenterDatasetVersion> versions, java.math.BigInteger versionId) {
+        if (versions == null || versions.isEmpty()) {
+            return null;
+        }
+        if (versionId == null) {
+            return versions.get(0);
+        }
+        return versions.stream().filter(version -> versionId.equals(version.getId())).findFirst().orElse(null);
+    }
+}