Migration - harmonize date formats of change events (#562)

CHANGELOG.md

@@ -10,12 +10,14 @@
 - Add URI to resource's organization responses
 - Fix query for organizations report [OP-3636]
 - Bump report-generation-service to most recent version
+- Write migration to harmonize date formats of change events [OP-3559]
 ### Deploy notes
 ```
 drc pull deltanotifier; drc up -d deltanotifier
 drc restart migrations-triggering-indexing resource
 drc pull frontend; drc up -d frontend
 drc pull report-generation; drc up -d report-generation
+drc restart migrations; drc logs -ft --tail=200 migrations
 ```
 
 ## v1.33.3 (2025-07-04)

config/migrations/2025/20250708140355-fix-changeevent-dates.sparql

@@ -0,0 +1,26 @@
+PREFIX org: <http://www.w3.org/ns/org#>
+PREFIX dcterms: <http://purl.org/dc/terms/>
+PREFIX xsd: <http://www.w3.org/2001/XMLSchema#>
+
+DELETE {
+  GRAPH ?g {
+    ?s dcterms:date ?oldDate .
+  }
+}
+INSERT {
+  GRAPH ?g {
+    ?s dcterms:date ?newDate .
+  }
+}
+WHERE {
+  GRAPH ?g {
+    ?s a org:ChangeEvent ;
+        dcterms:date ?oldDate .
+    FILTER(DATATYPE(?oldDate) != xsd:date)
+    FILTER(?g IN (
+      <http://mu.semte.ch/graphs/administrative-unit>,
+      <http://mu.semte.ch/graphs/worship-service>
+    ))
+    BIND(STRDT(SUBSTR(STR(?oldDate), 1, 10), xsd:date) AS ?newDate)
+  }
+}