CultCache mints a random record key and a wall-clock storedAt per write, so two writes never match byte for byte.
The writer now fixes every record key and the test compares what a reader consumes (schema, key, content) across two
writes. Builds; the shipped-catalog test still fails at this commit because the catalog lands in the next one.
Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com>
d382d4e062