v0.30.0

Changed

• MCP tool failures returned as JSON now share one envelope (#862):
  {"status": "refused" | "error", "error": <code>, "detail": <text>, ...}.
  refused means mureo declined before touching the platform; error
  means the call could not be evaluated or the operation failed. error is
  now always a stable snake_case code, and the text moved to detail.
  What an agent can notice:
  • tracking_preflight_failed: message is now detail, and the payload
    gains status: "refused"; findings and how_to_proceed are unchanged.
  • rollback_plan_get refusals carry status: "refused", error: <code>
    (invalid_arguments, state_file_not_found, state_file_unreadable,
    index_out_of_range, entry_not_reversible) and detail in place of
    reason, and keep plan: null.
  • rollback_apply and mureo_batch_begin / mureo_batch_end refusals:
    error is now a code (invalid_arguments, rollback_refused,
    batch_refused; rollback_dispatch_failed for a downstream exception)
    with the text in detail.
  • creative_studio_*, analysis_delivery_collapse_* and
    analysis_anomalies_check errors gain status: "error" and detail;
    their error is now invalid_arguments, provider_unavailable (no
    usable image provider, or the mureo[creative] extra missing) or
    provider_failed.
  • mureo_analytics_run's module failure gains error: "module_failed",
    and its detail is the curated exception text.
  • The journal now records these calls as refused / platform_error
    instead of ok, with "<code>: <detail>" as the reason (the
    auth_error envelope is recorded the same way, in place of its raw
    JSON body).
• FilesystemStateStore moved to mureo.context.state_store (#863);
  mureo.core still exports the name. mureo.core no longer imports
  mureo.context at load time, and the 24 function-local imports in
  mureo/context/ are top-level again. The remaining function-local
  imports inside mureo/context/ belong to a cycle within that package
  and are addressed in a later stage.

Fixed

• The journal recorded a refused or failed call as ok (#862). A
  tracking-preflight refusal, a refused or failed rollback_apply and every
  failure returned in the shared envelope were journalled as successes, and a
  mutation returning one could be promoted into action_log; both now read
  the shared envelope.
• rollback_apply crashed on a successful reversal (#862) with a
  TypeError serializing the dispatched tool's content, and returned a
  code-less status: "error" when the dispatched tool answered with an
  API error: envelope. A success now returns the tool's text(s) as
  result; the failure is the shared envelope with
  error: "rollback_dispatch_failed" and the tool's text as detail.