fix(tests): derive DB_PATH from DATABASE_URL instead of STORAGE_PATH (#2)

Co-authored-by: Claude Sonnet 4.6 <noreply@anthropic.com>

Author: nanotaboada

tests/test_migrations.py

@@ -11,14 +11,14 @@
 subsequent test runs.
 """
 
-import os
 import sqlite3
 
 from alembic import command
 
+from databases.player_database import DATABASE_URL
 from tests.conftest import ALEMBIC_CONFIG
 
-DB_PATH = os.getenv("STORAGE_PATH", "./players-sqlite3.db")
+DB_PATH = DATABASE_URL.replace("sqlite+aiosqlite:///", "")
 
 
 def test_migration_downgrade_003_removes_substitutes_only():