enhance(backend): restore OpenAPI endpoints (#10281)

* enhance(backend): restore OpenAPI endpoints

* Update CHANGELOG.md

* version

* set max-age

* update redoc

* follow redoc documentation

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Co-authored-by: tamaina <tamaina@hotmail.co.jp>

packages/backend/src/server/api/ApiServerService.ts

@@ -167,7 +167,7 @@ export class ApiServerService {
 		// Make sure any unknown path under /api returns HTTP 404 Not Found,
 		// because otherwise ClientServerService will return the base client HTML
 		// page with HTTP 200.
-		fastify.get('*', (request, reply) => {
+		fastify.get('/*', (request, reply) => {
 			reply.code(404);
 			// Mock ApiCallService.send's error handling
 			reply.send({