br-rust-common 0.9.0

[0.9.0] — 2026-06-13

Added

• br-util-graphql — Affordance.params. Affordance gains an optional
  params: Option<Json<BTreeMap<String, String>>> field: a structured,
  codes-keyed map (same Rust type and builder ergonomics as EdgeError's
  params) that attaches data keyed to reason_code, exposed on the wire as a
  nullable GraphQL JSON scalar (params: JSON). Attach it with the chainable
  Affordance::block(action, reason).with_param(key, value) / .with_params(...);
  allow / block leave it unset (renders null, existing outputs unchanged).
  The map is codes, never user-facing prose — human copy and i18n stay at the edge.

Changed

• br-util-graphql — Affordance is now #[non_exhaustive] (breaking). This
  is the breaking change that justifies the minor bump: external crates can no
  longer build an Affordance by struct literal — construct via
  Affordance::allow / Affordance::block (then .with_param / .with_params),
  the only supported path. In exchange, every future field addition to
  Affordance becomes non-breaking. In-crate literal construction is unaffected.