better error message for ensure exists

[simonLeary42]

No description provided.

[Copilot]

Pull Request Overview

This PR improves error messages by replacing generic \ensure() function calls with more specific ensureExists() method calls on LDAP entry objects. The change provides better error context by indicating which specific entry doesn't exist when validation fails.

• Replaces global \ensure($this->exists()) calls with $this->entry->ensureExists()
• Updates subproject commit reference for phpopenldaper library
• Affects multiple getter methods and initialization functions across user, organization, and group classes

Reviewed Changes

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

File	Description
resources/lib/phpopenldaper	Updates subproject commit hash
resources/lib/UnityUser.php	Replaces ensure calls in getter methods with entry-specific ensureExists
resources/lib/UnityOrg.php	Updates ensure call in organization initialization
resources/lib/UnityGroup.php	Updates ensure calls in group initialization and commented code

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