BulkResetTraffic resolved every address with its own GetRecordByEmail
call, one SELECT per email, purely to find the disabled clients it has to
re-enable. Resetting 30 clients issued 30 queries before the batched
transaction even started, while BulkAdjust, BulkDelete and BulkSetEnable
next to it already loaded their rows with a single chunked IN query.
Those three carried a verbatim copy each of both the trim/dedupe loop and
the chunked record load, so the reuse is the fix: trimmedUniqueEmails now
delegates to the existing uniqueNonEmptyStrings, and clientRecordsByEmail
holds the one chunked lookup all four call sites share.
A DB failure during the lookup now aborts the reset instead of being
swallowed per email; a missing row is still skipped, as before.
The new test drives BulkResetTraffic with 3 and with 30 emails and fails
unless both issue the same number of SELECTs against clients.
Sanaei