* [Fix] milestone close timestamp (#8728)
* BugFix: Update closed_date_unix colum on milestone table on close
* use go standart time lib
* make backport work!
* Fix issues/pr list broken when there are many repositories (#8409)
* fix issues/pr list broken when there are many repositories
* remove unused codes
* fix counting error on issues/prs
* keep the old logic
* fix panic
* fix tests
* rm unused import
* feat: highlight issue references with :
e.g. #1287: my commit msg
e.g. ABC-1234: my commit msg
* ref: update model regex to consistent with issueNumericPattern
* test: check highlight issue with : in commits messages
* fix milestone num_issues
* update missing completeness
* only update milestone closed number when closed issue is assigned a new milestone or clear milestone
* fix tests
* fix update milestone num
* fix completeness calculate
* make completeness calucation more clear