- ConfigFieldDeclaration (+ Zod) now declares the label/description/tier/values/
  synonyms metadata the .orb already carries through lowering, so config-driven
  UI (the playground property inspector) can derive typed controls without casts.
- New pure builder applyTraitConfigOverrides(schema, overrides): returns a new
  schema with config values applied to matching traits (patches declared-field
  defaults on inlined traits; merges values on { ref } references). Reused by the
  playground config inspector + the verify config-sweep.

Co-Authored-By: Claude Opus 4.8 (1M context) <noreply@anthropic.com>