Fix OpenAPI specification issues reported by the validator #2286
Description
OpenAPI validator middleware was created to validate requests and responses using the OpenAPI specification: https://github.com/apify/apify-core/issues/22169
Already, when running the integration tests, many validation errors exposed problems with the API. All those errors have to be fixed before the validator goes to production. Validator should be running in production only if there are no more errors detected in integration tests.
Full log from first round of integrations tests from validator draft https://github.com/apify/apify-core/pull/26052:
https://apify-pr-test-env-logs.s3.us-east-1.amazonaws.com/apify/apify-core/26052/api-307068194b80af8d01918bd63e7ac856d8649710.html
Such log should contain no OpenAPI validation error