Address 6 code review findings (P0-P3): add Redis distributed lock to prevent
duplicate Oracle pipeline on cold cache, apply rate limiting to 3 high-cost
routes, separate UI filter state from committed query state, add AbortController
for request cancellation, push workcenter group classification into Oracle SQL
CASE WHEN, and add 18 route+service tests. Also add workcenter group selection
to job-query equipment selector and rename button to "查詢".
Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>