[$] Development statistics for 6.19

Linus Torvalds releasedthe 6.19 kernel on February8, as expected. This developmentcycle brought 14,344 non-merge changesets into the mainline, making it thebusiest release since 6.16 in July 2025. As usual, we have put together aset of statistics on where these changes come from, along with a quick lookat how long new kernel developers stay around.