[6.x] Lock the Comb index file across each read-modify-write - #15725

[6.x] Lock the Comb index file across each read-modify-write#15725

duncanmcclean merged 3 commits into

statamic:6.xstatamic/cms:6.xfrom

edalzell:fix/comb-index-concurrent-writesedalzell/cms:fix/comb-index-concurrent-writesCopy head branch name to clipboard