GitHub Issue 1307: Simplify container filtering in GetTransactionRowIdsAction (#7841)

## Rationale
We no longer support cross-folder imports, so no need to look beyond the
current container

## Related Pull Requests
- <!-- list of links to related pull requests (replace this comment) -->

## Changes
- Always use the current container for filtering purposes

## Tasks 📍
- [x] Claude Code Review
- ~Manual Testing~
- ~Test Automation~

Author: labkey-jeckels

audit/src/org/labkey/audit/AuditController.java

@@ -383,7 +383,9 @@ public Object execute(AuditTransactionForm form, BindException errors)
         {
             AuditLogImpl.TransactionRowIds results;
             User elevatedUser = ElevatedUser.ensureCanSeeAuditLogRole(getContainer(), getUser());
-            ContainerFilter cf = ContainerFilter.getContainerFilterByName(form.getContainerFilter(), getContainer(), elevatedUser);
+            // Issue 1307: scope strictly to the current container. 26.7 removed cross-folder imports, so a
+            // transaction's rows live in the same container as the transaction
+            ContainerFilter cf = ContainerFilter.Type.Current.create(getContainer(), elevatedUser);
             if (form.isSampleType())
                 results = AuditLogImpl.get().getTransactionSampleIds(form.getTransactionAuditId(), elevatedUser, getContainer(), cf);
             else
@@ -403,7 +405,6 @@ public static class AuditTransactionForm
         private Long _transactionAuditId;
         private String _dataType;
         private boolean _isSampleType;
-        String _containerFilter;
 
         public Long getTransactionAuditId()
         {
@@ -430,16 +431,6 @@ public boolean isSampleType()
             return _isSampleType;
         }
 
-        public String getContainerFilter()
-        {
-            return _containerFilter;
-        }
-
-        public void setContainerFilter(String containerFilter)
-        {
-            _containerFilter = containerFilter;
-        }
-
         public void validate(Errors errors)
         {
             if (getTransactionAuditId() == null)