Flight-Ops plumbing minus game code: in-memory WASM DB, persist() via tmp+rename,
globalThis singleton. Schema is empty at scaffold stage; _meta plumbing table stamps
created_at on first open so the ./db volume holds a valid SQLite file from boot
(a brand-new sql.js database exports as zero bytes). instrumentation.ts opens it at
server start behind a runtime-guarded dynamic import (keeps node:fs out of the Edge
instrumentation bundle).
