The eslint-metrics.json snapshot duplicated the violation counts already
enforced by eslint-budgets.json. Keeping it current added a CI drift check,
a pre-commit regenerate-and-flag step, and a standalone npm run lint:metrics
script, none of which caught anything the budget gate did not, yet all of
which failed noisily whenever the snapshot went stale. This drops the file
and that machinery while leaving eslint-budgets.json as the actual ratchet
gate
* feat(ui): track frontend lint counts in a committed snapshot
Persist the eslint budget-rule counts (no-explicit-any, complexity,
max-depth) to eslint-metrics.json so the trend is queryable straight
from git history and can later feed a dashboard. A CI drift check
regenerated from the same lint report keeps the snapshot honest, so a
PR that shifts a count has to run npm run lint:metrics and commit it
* fix(ui): harden lint-metrics drift check and eslint failure handling
Make the drift comparison symmetric over the union of committed and
actual keys so a phantom rule left in eslint-metrics.json (for example
after a rule is dropped from eslint-budgets.json) is caught instead of
silently passing. Only swallow eslint's lint-errors exit code in the
generator and rethrow anything else, so a fatal eslint failure surfaces
its real output rather than a confusing ENOENT on the missing report
