feat(superset): add Year of Enrollment Created On filter to Enrollment Detail by Learner (#2450)

Adds a year_of_courserunenrollment_created_on calculated column to the
enrollment_detail_report dataset (same substring-based approach as the
Orders dashboard's year_of_order_created_date) and a matching native
filter on the Enrollment Detail by Learner dashboard, scoped like the
existing Platform filter. Verified on QA via ol-superset sync.

Author: rachellougee

src/ol_superset/assets/dashboards/Enrollment_Detail_by_Learner_da9e03d3-e1bb-45b8-981f-208deca90e7a.yaml

@@ -285,6 +285,41 @@ metadata:
         name: organization_name
       datasetUuid: 01f179b6-cb75-465f-8ceb-0525c24fa223
     type: NATIVE_FILTER
+  - cascadeParentIds: []
+    chartsInScope:
+    - 64
+    - 67
+    - 70
+    - 108
+    controlValues:
+      defaultToFirstItem: false
+      enableEmptyFilter: false
+      inverseSelection: false
+      multiSelect: true
+      searchAllOptions: true
+      sortAscending: false
+    defaultDataMask:
+      extraFormData: {}
+      filterState: {}
+      ownState: {}
+    description: ''
+    filterType: filter_select
+    id: NATIVE_FILTER-9xQ2vLmZpK4RtY7Wc3Jsd
+    name: Year Of Enrollment Created On
+    scope:
+      excluded: []
+      rootPath:
+      - ROOT_ID
+    tabsInScope:
+    - TAB-t1-4mh38qE
+    - TAB-pWPKo4rBS
+    - TAB-Eyu1xfak5
+    - TAB-tFB9eF2Ur
+    targets:
+    - column:
+        name: year_of_courserunenrollment_created_on
+      datasetUuid: 01f179b6-cb75-465f-8ceb-0525c24fa223
+    type: NATIVE_FILTER
   refresh_frequency: 86400
   shared_label_colors: []
   timed_refresh_immune_slices: []

src/ol_superset/assets/datasets/Trino/enrollment_detail_report_01f179b6-cb75-465f-8ceb-0525c24fa223.yaml

@@ -106,6 +106,18 @@ columns:
   python_date_format: null
   type: VARCHAR
   verbose_name: null
+- advanced_data_type: null
+  column_name: year_of_courserunenrollment_created_on
+  description: null
+  expression: substring(courserunenrollment_created_on, 1, 4)
+  extra: {}
+  filterable: true
+  groupby: true
+  is_active: true
+  is_dttm: false
+  python_date_format: null
+  type: null
+  verbose_name: null
 - advanced_data_type: null
   column_name: receipt_payment_method
   datetime_format: null