Move RuntimeIdentifier to iOS-specific PropertyGroup for proper evaluation

The previous location in the main PropertyGroup didn't work because
TargetFramework is not set during outer build evaluation. Moving the
RuntimeIdentifier assignment to the iOS-specific PropertyGroup (using
GetTargetPlatformIdentifier condition) ensures it's evaluated during
the inner build when TargetFramework is actually set to net10.0-ios.

This is the same pattern used for CodesignEntitlements, which works
correctly. Now both the binding project and main project will build
for simulator by default, avoiding code signing requirements in CI.

Author: sheiksyedm

10.0/AgeSignals/AgeSignals/AgeSignals.csproj

@@ -14,9 +14,6 @@
 		<SingleProject>true</SingleProject>
 		<ImplicitUsings>enable</ImplicitUsings>
 		<Nullable>enable</Nullable>
-		
-		<!-- Default iOS builds to simulator to avoid code signing requirements in CI -->
-		<RuntimeIdentifier Condition="'$(TargetFramework)' == 'net10.0-ios' AND '$(RuntimeIdentifier)' == ''">iossimulator-x64</RuntimeIdentifier>
 
 		<!-- Display name -->
 		<ApplicationTitle>Age Signals</ApplicationTitle>
@@ -86,6 +83,8 @@
 	<!-- iOS Entitlements -->
 	<PropertyGroup Condition="$([MSBuild]::GetTargetPlatformIdentifier('$(TargetFramework)')) == 'ios'">
 		<CodesignEntitlements>Platforms\iOS\Entitlements.plist</CodesignEntitlements>
+		<!-- Force simulator build when no RuntimeIdentifier specified (CI builds) -->
+		<RuntimeIdentifier Condition="'$(RuntimeIdentifier)' == ''">iossimulator-x64</RuntimeIdentifier>
 	</PropertyGroup>
 
 </Project>