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/Execution/RemoteThreadExecutor.cs

@@ -509,5 +509,6 @@ public sealed class RemoteThreadExecutor
             }
         }
 
-        return IntPtr.Zero;    }
+        return IntPtr.Zero;
+    }
 }