Harden the public endpoints.ValidateEndpoints guard used before StackRox integrations connect to…

Harden the public endpoints.ValidateEndpoints guard used before StackRox integrations connect to…: a task in MiMo-V2.6-RL-harbor-code: MiMo-V2.6-RL Code (Harbor) (Harbor dataset). An endpoint value is either a bare authority ( host :port , including bracketed IPv6) or an absolute http / https URL…