The androidTest compile failed ONLY in CI with "Unresolved reference 'observeAll'"
on the single line using dao.observeAll(), while every other MessageDao call in the
same file resolved, the identical observeAll().first().map{}.toSet() in
LibreMailDatabaseTest compiled fine in the same unit, and the file compiled cleanly
locally (even `clean --no-build-cache`). That points to a Kotlin incremental-compilation
artifact specific to the newly-added file, not a code error.
Replace the observeAll()-based readback with explicit getById point lookups — a clearer
per-row assertion that also sidesteps the glitch. Verified on the API 37 emulator (5/5).
Co-Authored-By: Claude Opus 4.8 <noreply@anthropic.com>
JMR-devandClaude Opus 4.8
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