[ENG] Feature Request: LdapQuery could import Observables, Tags, Custom Fields

[kiaora17]

Feature description
The LdapQuery analyzer allows to collect valuable information about the users of the directory. Among this information, some can be used to facilitate:

• the transition from a username to an email address by automatically importing the corresponding Observables,
• the filtering of observables by using automatically imported tags (e.g. which users are still Active),
• the construction of reliable dashboards (e.g. by automatically populating a custom field country).

Describe the solution you'd like
To do this, the analyzer could offer the possibility to:

• define which attributes could be imported as Observables,
• define which attributes could be imported as Tags,
• define which attributes could be imported as Custom Fields.

Additionally, to avoid flooding the LDAP server when processing large lists of usernames or email addresses, some filters could be implemented to only send relevant queries to the LDAP server.

Additional context
These feature requests would notably help to handle Credential Leak cases more efficiently.