refactor(api/health): simplify health info type

- Updated health-related functions to return simplified health information.
- Introduced HealthStatusString type for correct swagger and schema generation.
- Refactored HealthJSON structure to utilize the new HealthStatusString type.

internal/route/routes/query.go

@@ -17,6 +17,8 @@ type HealthInfoWithoutDetail struct {
 	Latency time.Duration      `json:"latency" swaggertype:"number"` // latency in microseconds
 } // @name HealthInfoWithoutDetail
 
+type HealthMap = map[string]types.HealthStatusString //	@name	HealthMap
+
 // GetHealthInfo returns a map of route name to health info.
 //
 // The health info is for all routes, including excluded routes.
@@ -39,6 +41,14 @@ func GetHealthInfoWithoutDetail() map[string]HealthInfoWithoutDetail {
 	return healthMap
 }
 
+func GetHealthInfoSimple() map[string]types.HealthStatus {
+	healthMap := make(map[string]types.HealthStatus, NumAllRoutes())
+	for r := range IterAll {
+		healthMap[r.Name()] = getHealthInfoSimple(r)
+	}
+	return healthMap
+}
+
 func getHealthInfo(r types.Route) HealthInfo {
 	mon := r.HealthMonitor()
 	if mon == nil {
@@ -73,6 +83,14 @@ func getHealthInfoWithoutDetail(r types.Route) HealthInfoWithoutDetail {
 	}
 }
 
+func getHealthInfoSimple(r types.Route) types.HealthStatus {
+	mon := r.HealthMonitor()
+	if mon == nil {
+		return types.StatusUnknown
+	}
+	return mon.Status()
+}
+
 // ByProvider returns a map of provider name to routes.
 //
 // The routes are all routes, including excluded routes.