Include manage:access metadata

doc/security/ssh_keys_restrictions.md

 ---
 type: reference, howto
+stage: Manage
+group: Access
+info: To determine the technical writer assigned to the Stage/Group associated with this page, see https://about.gitlab.com/handbook/engineering/ux/technical-writing/#designated-technical-writers
 ---
 
 # Restrict allowed SSH key technologies and minimum length

doc/security/two_factor_authentication.md

 ---
 type: howto
+stage: Manage
+group: Access
+info: To determine the technical writer assigned to the Stage/Group associated with this page, see https://about.gitlab.com/handbook/engineering/ux/technical-writing/#designated-technical-writers
 ---
 
 # Enforce Two-factor Authentication (2FA)

doc/security/user_email_confirmation.md

 ---
 type: howto
+stage: Manage
+group: Access
+info: To determine the technical writer assigned to the Stage/Group associated with this page, see https://about.gitlab.com/handbook/engineering/ux/technical-writing/#designated-technical-writers
 ---
 
 # User email confirmation at sign-up

doc/security/user_file_uploads.md

 ---
 type: reference
+stage: Manage
+group: Access
+info: To determine the technical writer assigned to the Stage/Group associated with this page, see https://about.gitlab.com/handbook/engineering/ux/technical-writing/#designated-technical-writers
 ---
 
 # User File Uploads