apify validate-schema passes schemas the platform build rejects

[patrikbraborec]

Problem

apify validate-schema reports a schema as valid that the platform then rejects at build time. The known case is JSON Schema draft 2020-12: the local validator accepts it, the build does not. A false green locally is only discovered after a full push and build cycle.

Expected

apify validate-schema uses the same validator as the platform build, so a local pass means the build accepts the schema.

Steps to reproduce

1. Write an input schema using draft 2020-12 constructs.
2. Run apify validate-schema: it passes.
3. Run apify push: the build fails on schema validation.