Reshaped onto main after #1039 landed the coercion engine
(typedColumnsFor / epochToIso / coerceForTargetEngine) — this PR is now
only the policy delta on top of it:
- validateManifest: replace the CLI-only allowEngineSwitch opt-in with a
direction rule — sqlite → pg allowed (upload UI and CLI alike),
pg → sqlite refused with a message naming the supported direction
- importFromPicpeak: derive crossEngine from the manifest's engine
(absent field = target engine, the exact pre-change behavior), log it,
return it; route passes it through
- scripts/migrate-sqlite-to-postgres.js: rely on the shared gate, drop
the flag
- restore card: direction stated in the intro, cross-engine notice after
a converting restore; both strings in en.json + de.json; removed the
orphaned settings.backup.picpeak locale node (unreferenced, stale copy)
- picpeakCrossEngine.test.js: direction policy, epochToIso (ms, seconds,
numeric strings), coerceForTargetEngine units, plus
PICPEAK_PG_TEST_URL-gated real-Postgres stored-value assertions
Co-authored-by: Paul Nothaft <53005142+the-luap@users.noreply.github.com>
Luca
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