fix: fix migrations for goose to run concurrently

Author: guybrush

backend/pkg/commons/db/migrations/postgres/20250112125552_add_idx_blocks_status_depositscountgt0.sql

@@ -1,13 +1,13 @@
 -- +goose NO TRANSACTION
 
 -- +goose Up
--- +goose StatementBegin
 SELECT 'creating idx_blocks_status_depositscountgt0';
+-- +goose StatementBegin
 CREATE INDEX CONCURRENTLY IF NOT EXISTS idx_blocks_status_depositscountgt0 ON blocks (status, (depositscount > 0)) where depositscount > 0;
 -- +goose StatementEnd
 
 -- +goose Down
--- +goose StatementBegin
 SELECT 'dropping idx_blocks_status_depositscountgt0';
+-- +goose StatementBegin
 DROP INDEX CONCURRENTLY IF EXISTS idx_blocks_status_depositscountgt0;
 -- +goose StatementEnd