message: Update postgres index in multi-wallet to use md5
diff: @@ -196,7 +196,7 @@ const _CREATE_SCHEMA_MULTI: [&str; 14] = [
  ON UPDATE CASCADE
  )",
  "CREATE INDEX IF NOT EXISTS ix_tags_encrypted_name ON tags_encrypted(wallet_id, name)",
  - "CREATE INDEX IF NOT EXISTS ix_tags_encrypted_value ON tags_encrypted(wallet_id, value)",
  + "CREATE INDEX IF NOT EXISTS ix_tags_encrypted_value ON tags_encrypted(wallet_id, md5(value))",
  "CREATE INDEX IF NOT EXISTS ix_tags_encrypted_wallet_id_item_id ON tags_encrypted(wallet_id, item_id)",
  "CREATE TABLE IF NOT EXISTS tags_plaintext(
  wallet_id VARCHAR(64) NOT NULL,
  