fix(konsistent): represent exact TypeScript type references as string alternatives to JSON Schema shapes

[felixarntz]

Pull Request Description

TypeScript type references in constant and type schemas overloaded JSON Schema's type property and rejected interpolated references. This separates exact TypeScript references from JSON Schema objects so references can use the same templates as other predicate strings.

Relevant technical choices

• Represent exact TypeScript references as strings while retaining JSON Schema objects for scalar constraints.
• Resolve templates before exact annotation matching across type and constant declaration/export predicates.
• Validate placeholders used in array item and object property type references.
• Regenerate published schemas and update unit, generated-schema, and e2e coverage.

Checklist

• All commits are signed (PRs with unsigned commits cannot be merged)
• Tests have been added / updated
• A changeset has been added (run pnpm changeset in the project root if package files were modified)
• I have reviewed this pull request (self-review)