✨ feat(qdrant): 新增 Qdrant 向量库连接支持

- 后端新增 Qdrant REST 连接、collection 元数据、scroll/search 查询与 upsert/delete/payload 更新

- 前端新增 Qdrant 类型、连接配置、图标、方言和能力矩阵

- 测试覆盖 mock REST、真实服务 smoke 和前端配置

Refs #555

frontend/src/utils/dataSourceCapabilities.test.ts

@@ -90,6 +90,24 @@ describe('dataSourceCapabilities', () => {
     });
   });
 
+  it('treats Qdrant as a queryable vector datasource without SQL export actions', () => {
+    expect(getDataSourceCapabilities({ type: 'qdrant' })).toMatchObject({
+      type: 'qdrant',
+      supportsQueryEditor: true,
+      supportsSqlQueryExport: false,
+      supportsCopyInsert: false,
+      supportsCreateDatabase: false,
+      supportsRenameDatabase: false,
+      supportsDropDatabase: false,
+      forceReadOnlyQueryResult: false,
+    });
+    expect(getDataSourceCapabilities({ type: 'custom', driver: 'qdrantdb' })).toMatchObject({
+      type: 'qdrant',
+      supportsQueryEditor: true,
+      supportsCopyInsert: false,
+    });
+  });
+
   it('treats OceanBase Oracle protocol as Oracle capabilities', () => {
     expect(getDataSourceCapabilities({
       type: 'oceanbase',