The guard compared import.meta.url against `file://${process.argv[1]}`, which
never matches on Windows (argv[1] is a drive-letter/backslash path), so
`yarn db:migrate` silently no-opped for local non-Docker dev. Use
pathToFileURL(process.argv[1]).href instead, which is correct on Windows and
Linux alike. Verified `yarn db:migrate` now creates all tables on Windows; the
Docker start path is unaffected.
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