Fix console blank filtering threshold parsing - #773

Summary

• preserve the legacy SampleMaxOverBlankAverage value
• also apply the console value to FoldChangeForBlankFiltering, which the blank filter reads
• add a regression test for custom sample-max/blank-average thresholds
• include the existing console test project in the solution so CI runs the regression test

Root cause

The console parser stored Sample max / blank average only in the legacy property, while alignment filtering reads FoldChangeForBlankFiltering. Both default to 5, hiding the mismatch until a custom threshold is configured.

Validation

• dotnet test tests/MSDIAL5/MsdialCoreTestAppTests/MsdialCoreTestAppTests.csproj --configuration "Debug vendor unsupported" (5 tests passed)