Address review findings for thread control and process discovery

- Drop the false WOW64 claim from GetContext32/SetContext32 docs and guard them for 32-bit targets only.\n- Make FrozenThread dispose the thread handles it owns; make Freeze(predicate) dispose filtered-out threads.\n- Pass the already-validated handle through GetThreadById instead of opening a second one.\n- Add no-progress guard to MemoryBase.EnumerateRegions.\n- Dispose unmatched Process candidates in ApplicationFinder.OpenProcess.\n- Clean up RemoteThreadExecutor allocation formatting.

WhiteMagic/Thread/RemoteThread.cs

@@ -139,11 +139,17 @@ public sealed class RemoteThread : IDisposable
     }
 
     /// <summary>
-    /// Reads the 32-bit native context of the thread. Valid for 32-bit targets or
-    /// WOW64 threads selected by a 64-bit caller.
+    /// Reads the 32-bit native context of the thread. Valid only for 32-bit targets.
     /// </summary>
     public void GetContext32(out Context32 context)
     {
+        if (_memory.Is64Bit)
+        {
+            context = default;
+            throw new InvalidOperationException(
+                "Use GetContext64 for 64-bit targets; GetContext32 is valid for 32-bit targets only.");
+        }
+
         context = new Context32 { ContextFlags = ContextFlags.X86Full };
         if (!NativeMethods.GetThreadContext(_handle, ref context))
         {
@@ -153,10 +159,14 @@ public sealed class RemoteThread : IDisposable
     }
 
     /// <summary>
-    /// Writes the 32-bit native context of the thread.
+    /// Writes the 32-bit native context of the thread. Valid only for 32-bit targets.
     /// </summary>
     public void SetContext32(ref Context32 context)
     {
+        if (_memory.Is64Bit)
+            throw new InvalidOperationException(
+                "Use SetContext64 for 64-bit targets; SetContext32 is valid for 32-bit targets only.");
+
         if (!NativeMethods.SetThreadContext(_handle, ref context))
         {
             int error = Marshal.GetLastPInvokeError();