v0.7.0

• ParseResult::valueOr($default): typed access without an exception
  (TValue|TDefault). Psalm cannot narrow ->value by ->ok, so
  $r->ok ? $r->value[...] : null stayed nullable; valueOr(null) plus a
  null check keeps the plugin's exact shape (ecosystem-sandbox pilot).
• README: the "event is one schema" recipe needs schema() declared as
  IntoSchema for the typed toWire(); an interface's SchemaInterface
  return type may be narrowed in the implementation.