0.1.0

First release (spec 17 §6.2, wave F). Requires indexnowkit/core ^0.9.

Added

• HistoryStoreInterface extends Submission\SubmissionStoreInterface — count(?host), last(),
  purge(DateTimeInterface): what the shipped stores add; the commands work with any SubmissionStoreInterface
  and use these when present.
• Psr16SubmissionStore — a ring buffer of history.limit records in a PSR-16 cache under
  <prefix>history.index / <prefix>history.<n> (no PSR-6 reserved characters); for one process, development and
  small sites.
• Pdo\PdoSubmissionStore and Pdo\Schema::sql(driver, table) — one row per URL, the rows of one Result
  grouped by batch; indexes on url, at, (host, at); table name validated; error cut to 1000 characters;
  schemas for sqlite, mysql, pgsql; docs/migrations.md with Doctrine Migrations, Laravel and Yii2 snippets.
• HistoryConfig — the history block (store: null|psr16|pdo, limit, key_prefix, pdo.dsn,
  pdo.service, pdo.table, retention_days; OPTIONS, fromArray(), disabled(), loadOrDisabled(), toArray()).
• Check\HistoryCheck — the history.store and history.records lines of check.
• Console\Definitions::history()/status(), Console\HistoryRunner, Console\StatusRunner — indexnow:history [--host] [--status] [--url] [--since] [--limit] [--json] [--purge[=days]] and indexnow:status [--json]
  (docs/status.schema.json).
• Both stores pass the S01–S08 kit of indexnowkit/testing.