postgres-new-audit.sql: notes about partition "inheritance" + docs link

config/sql/native-new/postgres-new-audit.sql

@@ -197,6 +197,11 @@ CREATE TABLE ma_audit_event_default PARTITION OF ma_audit_event DEFAULT;
 CREATE TABLE ma_audit_delta_default PARTITION OF ma_audit_delta DEFAULT;
 CREATE TABLE ma_audit_ref_default PARTITION OF ma_audit_ref DEFAULT;
 
+/*
+For info about what is and is not automatically created on the partition, see:
+https://www.postgresql.org/docs/13/sql-createtable.html (search for "PARTITION OF parent_table")
+In short, for our case PK and constraints are created automatically, but FK are not.
+*/
 ALTER TABLE ma_audit_delta_default ADD CONSTRAINT ma_audit_delta_default_fk
     FOREIGN KEY (recordId, timestamp) REFERENCES ma_audit_event_default (id, timestamp)
         ON DELETE CASCADE;
@@ -287,6 +292,11 @@ BEGIN
                 'CREATE TABLE %I PARTITION OF ma_audit_ref FOR VALUES FROM (%L) TO (%L);',
                     'ma_audit_ref_' || tableSuffix, dateFrom, dateTo);
 
+/*
+For info about what is and is not automatically created on the partition, see:
+https://www.postgresql.org/docs/13/sql-createtable.html (search for "PARTITION OF parent_table")
+In short, for our case PK and constraints are created automatically, but FK are not.
+*/
             EXECUTE format(
                 'ALTER TABLE %I ADD CONSTRAINT %I FOREIGN KEY (recordId, timestamp)' ||
                     ' REFERENCES %I (id, timestamp) ON DELETE CASCADE',