Takeover of #17785 by @tris203. Executions binding more than 64 KiB of text or blob data run on a throwaway statement, in the writer and the reader worker, so cached statements no longer pin large payloads in native memory.

Co-authored-by: tris203 <admin@snappeh.com>
Co-authored-by: Claude Opus 5.5 <noreply@anthropic.com>