docs: add Tailscale MySQL middleware guide

cai

2026-07-02 758dafeab0836ad6a8959bb3fefcdcaeb69a67d8

1
2
3
4
5
6
7
id,group,value,event_date
OBJ001,A,10,2026-06-01
OBJ002,A,15,2026-06-01
OBJ003,B,7,2026-06-02
OBJ004,B,8,2026-06-02
OBJ005,C,12,2026-06-03
OBJ006,C,13,2026-06-03