v1.25.0

Recurrence pattern in show --json

show --json reported due.recurring: true but not how a task recurs. The due object now carries a string field with the pattern:

"due": {
  "date": "2026-10-02",
  "datetime": null,
  "recurring": true,
  "string": "every friday"
}

It's present whenever due is non-null (the plain date phrase for one-off tasks, e.g. "25 Dec"), and null when the API supplies none. Tooling that archives or summarises tasks can now record every friday rather than a bare true.

Closes #23.