AssetManager 0.5.5.29

Added a configurable LDAP debug-logging option under authentication settings.
Reduced normal LDAP logs to the searched username, lookup result, and authentication result.
Detailed LDAP connection settings, search filters, distinguished names, attributes, provider results, and stack traces are written only while LDAP debug logging is enabled.
Set LDAP debug logging to disabled by default for new configurations.
Translated remaining German source-code comments and developer docstrings into English.
Kept localized user-interface text and translations unchanged.
No database schema changes were introduced.