Workers SDK miniflare@4.20260617.1 fixes Uint8Array step output buffer over-persistence in local Workflows

Patch Changes

• #14118 b38823f Thanks @aicayzer! - Fix Uint8Array step outputs in local Workflows being persisted with the full backing ArrayBuffer

  A Uint8Array returned from a Workflows step under wrangler dev was serialised together with its full underlying ArrayBuffer, causing a raw SQLITE_TOOBIG error at view sizes well below the documented 1MiB step-output limit. For example, a 200KB view sliced from an 800KB buffer (a common pattern from crypto.getRandomValues or arr.slice(...) on a larger pool) would fail. The view's bytes are now copied to a tight buffer before persistence, bringing local behaviour in line with production. Fixes #14101.