refactor: update timestamp and enhance publication slot migration notes in slot_fixes.yaml

frontend/public/schemas/20251121/linkml/manifest.json

@@ -1,5 +1,5 @@
 {
-  "generated": "2026-01-17T19:58:12.596Z",
+  "generated": "2026-01-17T20:10:50.954Z",
   "schemaRoot": "/schemas/20251121/linkml",
   "totalFiles": 2968,
   "categoryCounts": {

schemas/20251121/linkml/manifest.json

@@ -1,5 +1,5 @@
 {
-  "generated": "2026-01-17T20:10:50.954Z",
+  "generated": "2026-01-17T20:11:23.675Z",
   "schemaRoot": "/schemas/20251121/linkml",
   "totalFiles": 2968,
   "categoryCounts": {

schemas/20251121/linkml/modules/slots/slot_fixes.yaml

@@ -6846,20 +6846,22 @@ fixes:
     type: class
   processed:
     status: true
-    timestamp: '2026-01-17T20:10:00Z'
+    timestamp: '2026-01-17T21:45:00Z'
     session: session-2026-01-17-slot-migration
     notes: |
-      WELL_STRUCTURED_NO_MIGRATION_NEEDED: published_at is a datetime slot for 
-      publication timestamps with proper ontology alignment:
-      - slot_uri: dcterms:created
-      - Range: datetime (appropriate for publication timestamps)
+      FULLY_MIGRATED: Replaced published_at datetime with is_or_was_published_at + PublicationEvent per Rule 53/56.
       
-      The revision suggests PublicationEvent + TimeSpan which would be 
-      OVER-ENGINEERING for a simple publication datetime. Similar to 
-      was_last_updated_at - simple timestamps don't need event wrappers.
+      Files created:
+      - modules/classes/PublicationEvent.yaml (uses temporal_extent → TimeSpan)
+      - modules/slots/is_or_was_published_at.yaml (range: PublicationEvent)
       
-      Used in: SocialMediaContent.yaml, SocialMediaPost.yaml
-      Retaining as datetime slot for publication timestamps.
+      Files updated:
+      - modules/classes/SocialMediaContent.yaml (import + slot + slot_usage)
+      - modules/classes/SocialMediaPost.yaml (import + slot + slot_usage)
+      
+      ARCHIVED: modules/slots/archive/published_at_archived_20260117.yaml
+      
+      Note: Used existing temporal_extent slot and TimeSpan class as specified in revision.
 - original_slot_id: https://nde.nl/ontology/hc/slot/publication_series_name
   revision:
   - label: publishes_or_published