[enhancement] Improve ldap functions

[p0dalirius]

No description provided.

[Copilot]

Pull Request Overview

This PR enhances LDAP helper functions by improving error handling, renaming methods for clarity, and adding support for flushing attributes when no values are provided.

• Renamed and updated the base-DN existence check to return an error alongside the boolean.
• Extended OverwriteAttributeValues to call FlushAttributeValues when given an empty slice.
• Renamed FlushAttribute to FlushAttributeValues for consistency.

Reviewed Changes

Copilot reviewed 2 out of 2 changed files in this pull request and generated 3 comments.

File	Description
network/ldap/naming_contexts.go	Renamed BaseDNExists to DistinguishedNameExists, updated signature and docs.
network/ldap/modify.go	Added empty-slice handling in OverwriteAttributeValues; renamed flush method.

Comments suppressed due to low confidence (1)

network/ldap/modify.go:187

• New conditional branch for empty attribute values should be covered by unit tests to verify FlushAttributeValues is invoked correctly.

if len(attrVals) == 0 {