initTestSessionDb() creates an in-memory inbound singleton, but
openInboundDb() always opened the hardcoded /workspace/inbound.db
path. Every test that exercised getPendingMessages — directly, or via
test fixtures that load data through it (e.g. poll-loop.test.ts:29
loads formatter test rows via getPendingMessages) — failed with
SQLITE_CANTOPEN under `bun test` outside a real container.
Baseline on main: 34 pass, 25 fail across 6 files. After this fix:
59 pass, 0 fail.
In test mode, openInboundDb returns the in-memory singleton. The
singleton's .close() is no-op'd in initTestSessionDb so caller
try/finally cleanup doesn't tear down the shared DB; closeSessionDb
invokes the saved original close to do the real teardown.
Production behavior is unchanged — _inboundIsTest only flips inside
initTestSessionDb, which is never called outside the test runner.
Co-Authored-By: Claude Opus 4.7 (1M context) <noreply@anthropic.com>
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