`server.sessions.compaction-read-errors` mocks
`config/sessions/session-accessor.sqlite-read.js`, but production reaches
`loadTranscriptEvents` through re-exports: `server-methods/sessions-compact.ts`
imports it from the `session-accessor.js` barrel and
`preflightSessionTranscriptForManualCompact` imports it from the leaf. The
`gateway-server` project is `isolate: false`, so when a neighbour has already
evaluated those importers they stay bound to the real implementation and the
mock never fires -- the injected read error simply does not happen and all three
tests fail with `expected true to be false`, reading like a product regression.
Trigger: 33744584f3 added `server.chat-metadata-boundary.test.ts`, which boots
a full non-minimal Gateway in `beforeAll` and lands immediately before this file
in the shard. Main has gone red on it repeatedly since (32338154086, 32339521003,
32339928383, 32341300955, 32341946296); e294c154a6 fixed only the sibling
symptom where the factory had not run yet.
Route the file to a new `gateway-server-isolated` project instead, mirroring
`unit-fast-isolated` -- whose comment describes this exact hazard. A fresh graph
per file makes both symptoms structurally impossible rather than order-dependent.
The list is explicit so the reason travels with the file.
Not reproducible on macOS: the exact 24-file stripe in CI's own order, and the
triggering pair three times, are green locally every time.
Peter Steinberger
49cd6009cc