x) Updated argument expressions and method overrides in multiple classes

In this commit, several changes were made across different files:

- In `FSM.cs` and `Imm.cs`, the `[CallerArgumentExpression]` attribute was updated to reflect the correct argument names.
- The `ProcessWork` method in `Imm.cs` was changed from virtual to override.
- In `Log.cs`, the `[CallerArgumentExpression]` attribute was updated for clarity.
- A new override for the `GetHashCode()` method was added in `AddressStack.cs`.
- The version of "Microsoft.CodeAnalysis.CSharp" package reference was updated from 4.2.0 to 4.3.1 in 'SharpLib.csproj'.

These changes improve code readability and ensure that methods are correctly overridden where necessary. Also, updating the package version ensures compatibility with newer features or bug fixes provided by Microsoft's C# compiler platform.

SharpLib.csproj

@@ -22,7 +22,7 @@
 	</PropertyGroup>
 
   <ItemGroup>
-    <PackageReference Include="Microsoft.CodeAnalysis.CSharp" Version="4.2.0" />
+    <PackageReference Include="Microsoft.CodeAnalysis.CSharp" Version="4.3.1" />
     <PackageReference Include="Optional" Version="4.0.0" />
     <PackageReference Include="Optional.Async" Version="1.3.0" />
     <PackageReference Include="System.Collections.Immutable" Version="8.0.0" />

imm/FSM.cs

@@ -54,7 +54,7 @@ public record class FSM<TSUB, ST, CTX> : imm.Recorded<TSUB>, Imm
 													[CallerMemberName] string memberName = "",
 													[CallerFilePath] string filePath = "",
 													[CallerLineNumber] int lineNumber = 0,
-													[CallerArgumentExpression("fn")]
+													[CallerArgumentExpression("newState")]
 													string expression = default
 	)
 	{

imm/Imm.cs

@@ -340,7 +340,7 @@ public record class Timed<T> : Recorded<T>, imm.Imm
 													[CallerMemberName] string dbgName = "",
 													[CallerFilePath] string dbgPath = "",
 													[CallerLineNumber] int dbgLine = 0,
-													[CallerArgumentExpression("next")]
+													[CallerArgumentExpression("fn")]
 													string dbgExp = ""
 													)
 													where U : T
@@ -358,7 +358,7 @@ public record class Timed<T> : Recorded<T>, imm.Imm
 													)
 													=> ProcessWork( fn, reason, dbgName, dbgPath, dbgLine, dbgExp );
 
-	virtual public T ProcessWork( Func<T, T> fn,
+	override public T ProcessWork( Func<T, T> fn,
 													string reason,
 													string dbgName,
 													string dbgPath,

logging/Log.cs

@@ -45,7 +45,7 @@ public record struct Value<T>( T _val, string _exp = "" )
 	}
 
 	static public Value<U> Get<U>( U v,
-		[CallerArgumentExpression("fn")]
+		[CallerArgumentExpression("v")]
 			string dbgExp = ""
  )
  {

prof/AddressStack.cs

@@ -31,6 +31,8 @@ namespace Tracing
             return true;
         }
 
+				public override int GetHashCode() => _stack.GetHashCode();
+
 				public IReadOnlyList<ulong> Stack => _stack;
 
         public void AddFrame(ulong address)