PR #41642 - RocketChat/Rocket.Chat

Proposed changes

First of two PRs turning LDAP and SAML into Premium-only features. This one only announces it — nothing stops working on 8.x. The enforcement lives in #41643, targeting release-9.0.0.

Two channels, both aimed at workspaces that have no license covering the feature:

Admin settings: LDAP_Enable and SAML_Custom_<service> now carry a deprecation callout stating that version 9.0.0 will require a Premium plan.
Server log: the first LDAP or SAML login after a boot logs a warning naming the license module the workspace is missing (ldap-enterprise / saml-enterprise). Checked at login time, not at startup, so the license is already loaded and licensed workspaces never see it.

Warned once per module per process — enough for an ops alert to fire, quiet enough not to flood the log on a busy workspace.

Issue(s)

Prerequisite for making LDAP and SAML Premium-only in 9.0.0.

Steps to test or reproduce

Start a workspace with no license (or one without ldap-enterprise).
Open Admin → Settings → LDAP and confirm the callout on Enable. Same for Admin → Settings → SAML.
Log in with an LDAP user and confirm the warning in the server log; log in again and confirm it is not repeated.
Apply a license including ldap-enterprise and confirm no warning is logged on the next LDAP login.

Further comments

The callout text is shared by both settings (Premium_required_from_9_0_0_alert) and is rendered regardless of license, since a workspace that already has the plan reads it as a statement of fact rather than a warning. Say the word if you'd rather gate the callout on the missing module — that needs client-side license awareness in the settings page, not a settings flag.

Summary by CodeRabbit

Deprecation Notice
- LDAP and SAML authentication remain available for now on unlicensed workspaces.
- Admin settings now indicate that Premium licensing will be required starting with version 9.0.0.
- Administrators are warned when unlicensed LDAP or SAML authentication is used.