Description:
Logs activity on user accounts themselves (user logins and logouts are recorded in s_login)

PRIMARY KEY
s_user_id_c varchar (20) NOT NULL	User for which the user account activity got recorded.
s_activity_date_d date NOT NULL	Date of the recorded user account activity.
s_activity_time_i integer default: 0 NOT NULL	Time of the recorded user account activity.
s_activity_type_c varchar (50) NOT NULL	Type of the recorded account activity. This is a hard-coded constant value (there's no 'lookup table' for it); for available values and their meaning please check program code (TUserAccountActivityLog Class).

s_activity_details_c varchar (1000)	Details/description of the recorded account activity. This is a localised string, i.e. it can be recorded in the language of the Site! Refer to s_activity_type_c for exact identification of what the recorded account activity is about if text in here can't be understood because it is recorded in a foreign language.
s_date_created_d date default: CURRENT_DATE	The date the record was created.
s_created_by_c varchar (20)	User ID of who created this record.	s_user
s_date_modified_d date	The date the record was modified.
s_modified_by_c varchar (20)	User ID of who last modified this record.	s_user
s_modification_id_t timestamp default: CURRENT_TIMESTAMP	This identifies the current version of the record.
FOREIGN KEY s_user_account_activity_fkcr: s_created_by_c => s_user s_user_account_activity_fkmd: s_modified_by_c => s_user