fix: TypeScript strict mode errors in server and services

api/services/hetzner.ts

@@ -64,7 +64,7 @@ async function hetznerRequest<T>(endpoint: string): Promise<T> {
     throw new Error(`Hetzner API error: ${response.status} ${response.statusText}`)
   }
 
-  return response.json()
+  return response.json() as Promise<T>
 }
 
 // Sincronizar lista de servidores

api/services/monitoring.ts

@@ -143,11 +143,11 @@ export async function getMonitoringData() {
     GROUP BY category
   `)
 
-  // Parse details JSON
-  const itemsParsed = items.map(item => ({
+  // Parse details JSON and cast to MonitoringItem
+  const itemsParsed: MonitoringItem[] = items.map(item => ({
     ...item,
     details: typeof item.details === 'string' ? JSON.parse(item.details) : item.details
-  }))
+  } as MonitoringItem))
 
   // Organize by category
   const data: Record<string, MonitoringItem[]> = {}