Fix authority filter in SVM Transfers

[DenisCarriere]

This pull request updates the minutes_union query in src/routes/transfers/svm.sql to add support for filtering by the authority field in addition to the existing mint filter. This allows the query to group and select minute values based on the presence of an authority filter.

Query enhancements:

• Added a new SELECT statement to the minutes_union subquery to support filtering by authority, enabling queries to group by minute where the authority field matches the provided filter.