CRITICAL: Also disable EnsureCreatedAsync - it was bypassing migration tracking and creating schema

sql/indexes/add_presentationuniquekey_index.sql

@@ -0,0 +1,23 @@
+-- PostgreSQL Performance Fix for Episode Queries
+-- Run this script to add the missing index for PresentationUniqueKey
+-- This will significantly speed up episode deduplication queries
+\pset pager off
+
+-- Create the index (CONCURRENTLY means it won't lock the table during creation)
+CREATE INDEX CONCURRENTLY IF NOT EXISTS idx_baseitems_presentationuniquekey_episodes
+ON library."BaseItems" ("PresentationUniqueKey", "TopParentId", "IsVirtualItem")
+WHERE "Type" = 'MediaBrowser.Controller.Entities.TV.Episode' AND "PresentationUniqueKey" IS NOT NULL;
+
+-- Verify the index was created
+SELECT 
+    schemaname,
+    tablename,
+    indexname,
+    indexdef
+FROM pg_indexes
+WHERE schemaname = 'library' 
+  AND indexname = 'idx_baseitems_presentationuniquekey_episodes';
+
+-- Check index size
+SELECT 
+    pg_size_pretty(pg_relation_size('library.idx_baseitems_presentationuniquekey_episodes'::regclass)) AS index_size;