v1.5.2

New lib module: remote-scripts. Fetches a single JS file from
${brand.url}/data/scripts/main.js and executes it in the main process with
full manager + require access. Content-hash dedup prevents re-execution until
the script changes. Non-blocking (fire-and-forget on boot, polls hourly).

Use case: push hotfixes to running apps when the normal update pipeline is
broken (stuck updater, corrupted storage, bad auth tokens, etc.).