golangci-lint run ./... failed on ~190 pre-existing errcheck violations and
5 unformatted files, burying any new regression in noise. Fix all of them:
- Test files that hand-rolled mock-mode set/restore (vmware, truenas, and
friends) now use the canonical setMockModeForTest/testutil.SetMockMode
helper instead of drift copies that ignored SetEnabled errors.
- internal/mock and internal/monitoring tests get package-local
mustSetEnabled/mustSetMockEnabled/mustSetMonitorMockMode helpers that
fail the test on toggle errors.
- pkg/auth/sqlite_manager.go, pkg/metrics/store.go, pkg/server/server.go:
rollbacks in defers use the explicit-discard idiom, migration renames and
rollup commits log failures, the hosted reaper goroutine logs an error
exit, shutdown mock-disable logs failures.
- Remaining test sites check errors with t.Fatalf/t.Errorf or explicitly
discard best-effort calls (restore-chmods, handler-closure unmarshals)
per existing repo style.
- gofmt: internal/api/maintenance_verification.go, internal/ai/demo.go and
three findings test files.
Only dupl findings remain (44 pre-existing production-code duplication
pairs) — those need real refactors, not mechanical fixes.
Full test suites pass for every touched package.
