[Epic] Test-suite debt: skipped/disabled/flaky tests

Tracking epic for test-suite health debt: skipped/disabled tests needing triage, intermittent failures, ESM/rewire blocking patterns, CI-only crashing tests, and misplaced integration-style unit tests.

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_Filed by Claude (Opus 4.8), issue-backlog triage & grouping pass._

Start by inventorying the skipped, disabled, flaky, CI-only crashing, and integration-style tests described in the epic, including cases involving ESM and rewire. Break the inventory into focused issues with named test files and clear completion criteria for each test-suite health problem.

Written by the indexing model from the issue text.