feat(api): 统一公开接口为 /api/v1 前缀

将通用生成、Gemini、可灵、火山、健康检查与 OpenAPI 的推荐入口统一到 /api/v1，并保留历史路径作为兼容别名。同步更新代理配置、接入文档、接口清单和前缀回归测试。\n\n验证：go vet ./...；go test ./...；pnpm openapi；pnpm lint；pnpm test；pnpm build；公开 OpenAPI 71 个方法与接口清单机器比对一致。

apps/web/src/api.test.ts

@@ -266,8 +266,8 @@ describe('Public Agent resources', () => {
       modules: ['model-runtime'],
       fileName: 'ai-gateway-ops-management-v1.0.2.zip',
       downloadPath: '/api/v1/public/skills/ai-gateway-ops-management/download',
-      apiDocsJsonPath: '/api-docs-json',
-      apiDocsYamlPath: '/api-docs-yaml',
+      apiDocsJsonPath: '/api/v1/openapi.json',
+      apiDocsYamlPath: '/api/v1/openapi.yaml',
     };
     const fetchMock = vi.fn().mockResolvedValue(new Response(JSON.stringify(metadata), {
       status: 200,