"""Identity Sync Center — outbound employee-data sync hub.

The platform pulls authoritative people data from HRIS (SuccessFactors)
into ``identity_persons`` + ``identity_org_membership``. Many downstream
systems (Google Workspace custom schemas, Navan T&E, generic
SCIM endpoints) need that data projected into their user records so
finance / travel / collaboration tools see the same org chart.

This domain is the central place to:

* Define WHO to sync (filter): department subtree, country, status, ...
* Define WHAT to sync (mapping): rule list mapping IdentityPerson
  attributes to downstream field names with optional transforms,
  value lookup tables, defaults.
* Define WHEN to sync (schedule): cron / event-driven / manual.
* Define HOW to sync (kind): generic SCIM 2.0, Navan preset, Google
  custom-schema field push.
* Show admins WHAT happened (runs / per-person state / errors).

See ``models.py`` for the table layout, ``mapping.py`` for the
expression contract, and ``runners/`` for the per-kind drivers.
"""