Improve OpenAPI response payload typing for Swagger data schemas (#3102)

* Fix custom parser OpenAPI types and add structured default response schema

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* Document all registerPath responses and normalize OpenAPI parser schemas

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* Add concrete OpenAPI data schemas for selected routes

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* Reformat generated OpenAPI response schemas for readability

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* Remove obsolete stoi import from blueprint OpenAPI route

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server/private/routers/ssh/signSshKey.ts

@@ -93,7 +93,22 @@ export type SignSshKeyResponse = {
 //             }
 //         }
 //     },
-//     responses: {}
+// responses: {
+// 200: {
+// description: "Successful response",
+// content: {
+// "application/json": {
+// schema: z.object({
+// data: z.unknown().nullable(),
+// success: z.boolean(),
+// error: z.boolean(),
+// message: z.string(),
+// status: z.number()
+// })
+// }
+// }
+// }
+// }
 // });
 
 export async function signSshKey(