1.3.0

Synced bundled spec (content_api_mcp/schema/endpoints.json) to the module's v1.11 (previously v1.7 — four versions behind), adding two new tools and extending two existing ones:

• content_records_parity (module #120): GET records/{classRef}/{id}/parity — compares a record and everything it $owns between draft and live, reporting a machine-readable structure plus a flat report list. See dynamic/silverstripe-content-api PR #138.
• content_fingerprint (module #131): GET fingerprint — a deterministic, path-keyed snapshot of the site's content for diffing across gates or environments, plus a reachability-invariant check (violations). See dynamic/silverstripe-content-api PR #139.
• content_records_stage gains liveOnly and dryRun (module #90/#102, mode: subtree only) — preview or selectively skip a subtree publish without writing. mode: subtree itself now also authorization-checks every descendant before writing anything, refusing the whole call (403 FORBIDDEN_CLASS/FORBIDDEN_RECORD, nothing written) on the first one the caller can't publish. See dynamic/silverstripe-content-api PR #113.
• content_batch gains dryRun (module #130) — runs the batch with full authorization/validation inside an unconditionally-rolled-back transaction, prefixing response statuses would* on success. Its rollback is verified the same way an atomic failure's is (module #127), including the new updated-op re-check that verification gained alongside it. See dynamic/silverstripe-content-api PR #140 (#130) and PR #135 (#127).
• No client code change needed — client.py's path-substitution/query-vs-body handling is already generic; both new tools and both new parameters work as soon as the spec lands.

Supersedes the never-tagged 1.2.1. See CHANGELOG.md for the full 1.2.1/1.3.0 history.