[BUG] Set Limit on Land Use Coverages to 100% for Subcatchments #124

SWMM Version 5.2.4
OS: Windows11, version 25H2
Currently there is no limit on the pollutant land use coverages within a subcatchment - it can exceed 100% which should not be allowed. If you have two pollutant land uses and assign 100% coverage to both of them within a subcatchment, then the pollutograph concentrations and mass loading is fully applied to both. You can test this with the model attached in Issue USEPA#229.