v1.2.2

Fixed

• Signed integer overflow in Rule.Compare() — safe comparison replaces subtraction
• cfile handle() .tmp files not cleaned up on exit
• rtable.New() and config.New() leaked goroutines on error
• rtable.Update() lost the rule when Update() returned an error
• cfile.Close() set closed = false instead of true
• Empty rule ID could be inserted into rule index

Refactored

• Project layout restructured: yfwd/ → internal/
• Server directories renamed: cmdserver → cmd, webserver → http
• Swagger generation moved to go generate
• Removed dead context/cancel fields from rtable.Manager

Chore

• Single-instance lock via flock at startup
• Better error logging in rtable.save()
• Updated build scripts and CI workflow paths