Disable EF Core migrations for .NET 11 preview - use manual SQL scripts instead

sql/fix-activitylog-index.sql

@@ -0,0 +1,27 @@
+-- ================================================
+-- Fix for ActivityLogs Index
+-- Run this separately to create the missing index
+-- ================================================
+--
+-- This creates the ActivityLogs index that couldn't be created
+-- from within the main migration script due to PostgreSQL
+-- limitations with CONCURRENT operations in functions.
+--
+-- ================================================
+
+-- Create the ActivityLogs index
+-- This will error gracefully if the table doesn't exist
+CREATE INDEX CONCURRENTLY IF NOT EXISTS idx_activitylogs_userid_datecreated
+ON activitylog."ActivityLogs" ("UserId", "DateCreated" DESC)
+WHERE "UserId" IS NOT NULL;
+
+-- Verify it was created
+SELECT 
+    schemaname AS "Schema",
+    tablename AS "Table",
+    indexname AS "Index Name",
+    indexdef AS "Definition"
+FROM pg_indexes
+WHERE indexname = 'idx_activitylogs_userid_datecreated';
+
+-- Expected: 1 row showing the index on activitylog.ActivityLogs