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/api/internal/httpapi/openapi_models.go

@@ -23,8 +23,8 @@ type SkillBundleMetadataResponse struct {
 	Modules         []string `json:"modules" example:"model-runtime"`
 	FileName        string   `json:"fileName" example:"ai-gateway-ops-management-v1.0.2.zip"`
 	DownloadPath    string   `json:"downloadPath" example:"/api/v1/public/skills/ai-gateway-ops-management/download"`
-	APIDocsJSONPath string   `json:"apiDocsJsonPath" example:"/api-docs-json"`
-	APIDocsYAMLPath string   `json:"apiDocsYamlPath" example:"/api-docs-yaml"`
+	APIDocsJSONPath string   `json:"apiDocsJsonPath" example:"/api/v1/openapi.json"`
+	APIDocsYAMLPath string   `json:"apiDocsYamlPath" example:"/api/v1/openapi.yaml"`
 }
 
 type ErrorEnvelope struct {