Update domain controller sAMAccountName value

[Naksen]

No description provided.

[Copilot]

Pull request overview

Updates domain controller naming to consistently use the host’s short name (pre-FQDN dot) via a new computed setting, avoiding dotted values in places like sAMAccountName.

Changes:

• Added Settings.HOST_MACHINE_SHORT_NAME computed field derived from HOST_MACHINE_NAME.
• Switched domain controller name / sAMAccountName writes to use HOST_MACHINE_SHORT_NAME during initial setup and DC creation script.
• Updated the existing Alembic migration that creates the “Domain Controllers” OU to also use HOST_MACHINE_SHORT_NAME.

Reviewed changes

Copilot reviewed 4 out of 4 changed files in this pull request and generated 2 comments.

File	Description
app/ldap_protocol/auth/use_cases.py	Uses short host name when creating the initial Domain Controller directory + sAMAccountName.
app/extra/scripts/add_domain_controller.py	Uses short host name for DC directory name and related attributes when adding DC post-setup.
app/config.py	Introduces HOST_MACHINE_SHORT_NAME computed field.
app/alembic/versions/ebf19750805e_add_domain_controllers_ou.py	Updates OU/DC creation logic in an existing migration to use the short host name.

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