Add audit_log table for tracking audit events and actions

src/FederationServer/Classes/Resources/audit_log.sql

@@ -0,0 +1,35 @@
+create table audit_log
+(
+    uuid      varchar(36) default uuid()              not null comment 'The Unique Universal Identifier of the log record'
+        primary key comment 'The Unique Universal Identifier primary unique index',
+    operator  varchar(36)                             null comment 'Optional. The operator involved in the action',
+    entity    varchar(36)                             null comment 'The Unique Universal Identifier of the entity involved in this action',
+    type      varchar(36)                             not null comment 'The audit action type',
+    message   text                                    not null comment 'The log message',
+    timestamp timestamp   default current_timestamp() not null comment 'The timestamp for when this log event was created',
+    constraint audit_log_uuid_uindex
+        unique (uuid) comment 'The Unique Universal Identifier primary unique index',
+    constraint audit_log_entities_uuid_fk
+        foreign key (entity) references entities (uuid)
+            on update cascade on delete set null,
+    constraint audit_log_operators_uuid_fk
+        foreign key (operator) references operators (uuid)
+            on update cascade on delete set null
+)
+    comment 'The table for housing audit logs';
+
+create index audit_log_entity_index
+    on audit_log (entity)
+    comment 'The Index of the entity uuid';
+
+create index audit_log_opreator_index
+    on audit_log (operator);
+
+create index audit_log_timestamp_index
+    on audit_log (timestamp)
+    comment 'The index of the log timestamp';
+
+create index audit_log_type_index
+    on audit_log (type)
+    comment 'The index of the log type';
+