model-resolver.test.ts and prometheus-agent-config-builder.test.ts use
spyOn(shared, 'log') but do not own the logger module. When other test
files in the same bun test process call mock.module('../shared/logger'),
the import cache is poisoned and the spyOn targets a stale binding.
Add a lightweight mock.module call at the top of each file so the
auto-detection in run-ci-tests.ts picks them up as isolated targets.
This ensures each file gets its own module instance and the spy
captures all calls correctly.
Fixes the flaky CI failure pattern where resolveModelWithFallback and
buildPrometheusAgentConfig tests pass locally (separate bun process)
but fail in the shared CI batch.
Previously, Prometheus always used params.currentModel (UI-selected model)
when no explicit configuration existed. This bypassed the intended fallback
chain (claude-opus-4-6 → gpt-5.4 → glm-5 → gemini-3.1-pro).
Now, the UI-selected model is only used if it matches one of the models
in Prometheus's fallback chain. Otherwise, the fallback chain resolution
takes over and finds an available model.
Fixes#2986
YeonGyu-Kim