fix(calendar-sync): stop EXDATE scan loop on comma-separated values

calendar-sync--get-exdates read (match-end 0) after split-string, whose internal matching clobbers the match data. The scan position jumped back to a comma offset inside the value and re-matched the same EXDATE line forever, growing the result list until the kernel OOM killer took the whole session down (twice, 2026-07-13). The fix captures the line's end position before the split. The comma-separated tests added with a9e61207 were the first code to hit this path. All 12 exdates tests and all 56 calendar-sync test files now pass in milliseconds.

0 files changed, 0 insertions, 0 deletions