X_SIDE_EFFECTS_UNSCANNED
Means
the scan walked no package, or found no import-time effect anywhere
Typical cause
a glob that matches nothing reads exactly like a tree with no lies in it, and this tree has 30-odd registerErrorCodes calls
Fix
edit PACKAGE_GLOB and scanTopLevelEffects in scripts/side-effects.ts until bun run side-effects --json reads this repo's packages again