Amount column in quality_* tables should be of float type

[weilu]

Consider creating a quality_cci_silver table and move the following operations from quality_cci_bronze there and add amount coercing step too.
https://github.com/dime-worldbank/mega-boost/blob/56e764c3840e06d71f31acf2a235568bffb5fc62/quality/transform_load_dlt.py#L34C1-L37C56