Bug 42391: (QA follow-up): Clarify exception_action ref-passthrough comment

Signed-off-by: Kyle M Hall <kyle@bywatersolutions.com>
Signed-off-by: Tomás Cohen Arazi <tomascohen@theke.io>
Signed-off-by: Pedro Amorim <pedro.amorim@openfifth.co.uk>

Koha/Schema.pm

@@ -38,7 +38,8 @@ sub connection {
         sub {
             my ($msg) = @_;
 
-            # Don't re-wrap Koha exceptions that DBIC is re-throwing (e.g. from txn_do)
+            # Pass through any pre-thrown exception object (Koha exceptions, DBIx::Class::Exception
+            # re-thrown from txn_do, etc.). Translation only applies to plain error message strings.
             die $msg if ref($msg);
 
             # Attempt translation — throws a Koha exception on match