feat: add full path label tooltip for workflow filter field (#16580)

# Closes Issue: Can't distinguish between fields with identical names
(#16285)

There was a UX bug in the workflow filter interface where **two
variables coming from different steps but sharing the same field name**
were displayed identically. This made it difficult for users to tell
them apart when used in a filter group, leading to confusion when
building workflows.

---

# Fix: Add Full Path Label Tooltip for Workflow Filter Field

- Adds a **tooltip/label showing the complete path** so users can
distinguish fields from different workflow steps even if they share the
same name.

## UX Improvements
<img width="495" height="288" alt="image"
src="https://github.com/user-attachments/assets/fa26f381-835b-4d14-bf73-f04b59c8d0b5"
/>

packages/twenty-front/src/modules/workflow/workflow-steps/workflow-actions/filter-action/components/WorkflowStepFilterFieldSelect.tsx

@@ -58,7 +58,7 @@ export const WorkflowStepFilterFieldSelect = ({
     part: 'stepId',
   });
 
-  const { variableLabel } = useSearchVariable({
+  const { variableLabel, variablePathLabel } = useSearchVariable({
     stepId,
     rawVariableName: stepFilter.stepOutputKey,
     isFullRecord: stepFilter.isFullRecord ?? false,
@@ -110,6 +110,7 @@ export const WorkflowStepFilterFieldSelect = ({
             selectedOption={{
               value: stepFilter.stepOutputKey,
               label: disabledLabel,
+              fullLabel: variablePathLabel,
               Icon: icon,
             }}
             isDisabled={true}
@@ -127,6 +128,7 @@ export const WorkflowStepFilterFieldSelect = ({
         <SelectControl
           selectedOption={{
             label,
+            fullLabel: variablePathLabel,
             value: stepFilter.stepOutputKey,
             Icon: icon,
           }}