* perf(logging): bound call-log rotation work
* refactor(usage): extract call-log rotation/pruning from callLogs.ts to satisfy the file-size gate
Move the bounded rotation scheduler, orphan-artifact scanner, and row/overflow
pruning helpers (deleteCallLogsBefore, trimCallLogsToMaxRows,
cleanupOverflowCallLogFiles, cleanupOrphanCallLogFiles, rotateCallLogs,
scheduleCallLogRotation) into a new src/lib/usage/callLogRotation.ts module.
Pure extraction, no behavior change — callLogs.ts re-exports the same public
symbols so existing importers (usageDb.ts, compliance/index.ts, the
purge-logs route, and the rotation/cap test suite) are unaffected. Brings
callLogs.ts from 1108 to 787 lines, under the 1000-line file-size cap.
Co-authored-by: diegosouzapw <8016841+diegosouzapw@users.noreply.github.com>
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Co-authored-by: diegosouzapw <8016841+diegosouzapw@users.noreply.github.com>