v0.23.0 - Non-Raising Invalid-Status Result For Set Status

Fixed

• set_status: an out-of-vocabulary status value for a given type (all
  13 domains, including adr) no longer raises a pydantic.ValidationError
  -- it returns a new, non-raising InvalidStatusResult
  (valid/type/status/allowed_values/message) instead, so the
  allowed-values detail survives MCP clients that truncate isError: true
  results. Every other set_status failure mode (unknown id,
  path-injection/wrong-shape id, superseded_by misuse on a non-adr
  type) still raises unchanged. New ADR
  b399f1ce-ed42-4929-b01c-7a57d18e8014 extends ADR
  519d1206's non-raising, structured-result workaround (previously scoped
  to validate) to this case (GitHub issue #103).