Update README paths and disable EnsureCreatedAsync to prevent automatic schema creation

sql/README-DATABASE-SETUP.md

@@ -29,7 +29,7 @@ This creates:
 After the main schema is created, apply the performance indexes:
 
 ```sh
-psql -U jellyfin -d jellyfin -f sql/apply-supplementary-indexes-migration.sql
+psql -U jellyfin -d jellyfin -f sql/indexes/apply-supplementary-indexes-migration.sql
 ```
 
 This creates 5 additional performance indexes for:
@@ -94,7 +94,7 @@ If your database structure is already correct, just add the performance indexes:
 
 ```sh
 # Apply supplementary indexes
-psql -U jellyfin -d jellyfin -f sql/apply-supplementary-indexes-migration.sql
+psql -U jellyfin -d jellyfin -f sql/indexes/apply-supplementary-indexes-migration.sql
 
 # Apply ActivityLog index fix
 psql -U jellyfin -d jellyfin -f sql/fix-activitylog-index.sql
@@ -112,7 +112,7 @@ psql -U jellyfin -d postgres -c "DROP DATABASE IF EXISTS jellyfin;"
 
 # Recreate from schema
 psql -U jellyfin -d postgres -f sql/schema_init/create_database_schema.sql
-psql -U jellyfin -d jellyfin -f sql/apply-supplementary-indexes-migration.sql
+psql -U jellyfin -d jellyfin -f sql/indexes/apply-supplementary-indexes-migration.sql
 psql -U jellyfin -d jellyfin -f sql/fix-activitylog-index.sql
 ```
 
@@ -126,8 +126,14 @@ D:\Projects\pgsql-jellyfin\
 │   ├── schema_init/
 │   │   ├── create_database_schema.sql          ← Main database schema
 │   │   └── 10_create_supplementary_indexes.sql ← (EF migration file)
-│   ├── apply-supplementary-indexes-migration.sql ← Performance indexes
-│   └── fix-activitylog-index.sql                 ← ActivityLog index fix
+│   ├── indexes/
+│   │   └── apply-supplementary-indexes-migration.sql ← Performance indexes
+│   ├── diagnostics/
+│   │   ├── diagnostics.sql
+│   │   ├── monitor-query-performance.sql
+│   │   └── query-analysis.sql
+│   ├── fix-activitylog-index.sql                 ← ActivityLog index fix
+│   └── README-DATABASE-SETUP.md                  ← This file
 ```
 
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