bpo-37363: Add audit events on startup for the run commands (GH-14524)

diff --git a/Doc/library/sys.rst b/Doc/library/sys.rst
index 131aea0..acd5442 100644
--- a/Doc/library/sys.rst
+++ b/Doc/library/sys.rst
@@ -905,6 +905,12 @@
    read, so that you can set this hook there.  The :mod:`site` module
    :ref:`sets this <rlcompleter-config>`.
 
+   .. audit-event:: cpython.run_interactivehook hook sys.__interactivehook__
+
+      Raises an :ref:`auditing event <auditing>`
+      ``cpython.run_interactivehook`` with the hook object as the argument when
+      the hook is called on startup.
+
    .. versionadded:: 3.4