fix(query): modernize CalculationFilterGroup and adjust IsValid behavior

Refactors the `CalculationFilterGroup` class to utilize C# primary constructors and property initializers, improving conciseness and readability.

The `IsValid()` method's logic is updated. Previously, it returned true if *any* filter in the group was valid. Now, it returns true only if *all* filters are valid, and an empty filter group is considered valid. This adjustment clarifies the group's validity criteria, aligning with common interpretations for `All` operations and addressing related technical debt.

.claude/settings.local.json

@@ -23,7 +23,9 @@
       "Bash(Get-ChildItem src/Strata.SqlTools.SqlServer/ExpressionFactory/Query/*.cs)",
       "Bash(Measure-Object)",
       "Bash(Select-Object -ExpandProperty Count)",
-      "PowerShell(dotnet build *)"
+      "PowerShell(dotnet build *)",
+      "Bash(Get-ChildItem src/Strata.SqlTools.Query/*.cs)",
+      "Bash(Select-String -Pattern '^namespace ')"
     ]
   }
 }