Schema Author Prompt

Create or update the schema named <schema>.

Constraints:

• product-neutral,
• supports forge_run_id correlation when relevant,
• supports partial/incomplete state,
• can be rendered in Lenses,
• no runtime-specific implementation details,
• include a sample JSON object,
• update scripts/check_foundation.py only if required.

Return:

• changed schema,
• sample object,
• compatibility notes,
• migration concerns.