test: bun run check hangs in scripts/sec-remediate.test.ts

[namastex888]

Summary

Dogfood baseline found bun run check can hang during the test phase around scripts/sec-remediate.test.ts.

Verification Needed

Run the targeted serial check:

bun test scripts/sec-remediate.test.ts --timeout 30000

If the targeted test hangs, this is a real test bug. If it passes serially, classify as full-suite contention and isolate the shared resource.

Expected

bun run check must complete serially without hanging.

Impact

This blocks the release gate because release work requires bun run check green before push/publish.

[namastex888]

Closed by #1499 (merged) — sec-remediate.test.ts is now in EXCLUSIVE_TEST_FILES set in scripts/test-parallel.ts and excluded from parallel sharding. Verified-green serially, verified-broken under parallel-runner contention. Underlying contention should be addressed (port races, mock teardown bleed) but the quarantine unblocks CI.