…d start (#3900)

Fixes an intermittent `Test timed out in 30000ms` in the
`streamBatchItems` suite. Not a logic hang — the 30s budget covers
container setup, and each case boots its own per-test Redis container +
a full `RunEngine`, so under CI Docker contention a cold boot can cross
30s (which is why the failure moved between tests).

- New `containerTestWithIsolatedRedisNoClickhouse` fixture (Postgres
clone + per-test Redis, no ClickHouse) — this suite never uses
ClickHouse, but the old fixture's auto `resetClickhouse` forced a
ClickHouse boot + migration onto the cold-start test.
- Raised `testTimeout` 30s → 120s, matching the run-engine convention
for this footprint.