Security advisory 2 addressed

backend/app/database.py

@@ -213,7 +213,7 @@ CREATE TABLE IF NOT EXISTS email_address_verification_tokens (
 CREATE INDEX IF NOT EXISTS idx_user_email_addresses_user_id ON user_email_addresses(user_id);
 CREATE INDEX IF NOT EXISTS idx_email_address_verification_tokens_address_id ON email_address_verification_tokens(email_address_id);
 '''),
-     (13, '''
+    (13, '''
 CREATE TABLE IF NOT EXISTS pending_primary_email_changes (
      id TEXT PRIMARY KEY,
      user_id TEXT NOT NULL UNIQUE,
@@ -223,6 +223,9 @@ CREATE TABLE IF NOT EXISTS pending_primary_email_changes (
      created_at TEXT NOT NULL DEFAULT CURRENT_TIMESTAMP,
      FOREIGN KEY(user_id) REFERENCES users(id) ON DELETE CASCADE
 );
+'''),
+    (14, '''
+DROP TABLE IF EXISTS pending_primary_email_changes;
 ''')
 ]