Two compilation errors were preventing CI/Platform (Go) from running any
tests at all (go vet failed first):
1. delegation_list_test.go: missing `db` import. The file assigns
`db.DB = mockDB` but never imported the `db` package — a silent
omission that compiled before the staging promotion's go.mod bump.
2. org_helpers_security_test.go: three test functions redeclared in
org_helpers_pure_test.go (both files added by the staging promotion):
TestIsSafeRoleName_Valid, TestMergeCategoryRouting_EmptyListDropsCategory,
TestMergeCategoryRouting_EmptyKeySkipped. Removed from security file;
pure_test.go versions use testify and are more comprehensive.
Together with the prevDB/restore fixes in the previous commits, this
should make CI/Platform (Go) fully green.
Refs: mc#975
Co-Authored-By: Claude Opus 4.7 <noreply@anthropic.com>