feat(#1043): pin ITSAppUsesNonExemptEncryption to the export answer

The owner answered standard algorithms on build 41171670352, and it moved to Ready to Submit with no document. The answer is recorded on #958. The next build shows whether Apple still asks.

Epic #1014, Feature #200.

Agent: ChartreuseBay (session 425e424d)

Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com>

ios/Runner/Info.plist

@@ -24,6 +24,8 @@
 	<string>????</string>
 	<key>CFBundleVersion</key>
 	<string>$(FLUTTER_BUILD_NUMBER)</string>
+	<key>ITSAppUsesNonExemptEncryption</key>
+	<true/>
 	<key>LSApplicationQueriesSchemes</key>
 	<array>
 		<string>http</string>