fix(types): narrow HealthResponse to match api

Co-Authored-By: Claude Opus 4.7 (1M context) <noreply@anthropic.com>

Author: FrancescoSaverioZuppichini

src/index.ts

@@ -46,7 +46,6 @@ export type {
 	FormatResponseMap,
 	FormatType,
 	HealthResponse,
-	HealthServices,
 	HistoryEntry,
 	HistoryFilter,
 	HistoryPage,

src/types.ts

@@ -411,15 +411,9 @@ export interface CreditsResponse {
 	jobs: CreditsJobs;
 }
 
-export interface HealthServices {
-	redis: "ok" | "down";
-	db: "ok" | "down";
-}
-
 export interface HealthResponse {
-	status: string;
+	status: "ok" | "degraded";
 	uptime: number;
-	services?: HealthServices;
 }
 
 export interface ApiResult<T> {