ci(release): cap memory of the Android release build

v0.1.5 got past Metro, but the Gradle daemon was killed mid-bundle on the
8 GB runner. Compile Kotlin inside the Gradle JVM instead of a second
daemon, limit Gradle and Metro to two workers, set the heap explicitly and
print free/dmesg when the build fails.

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

apps/mobile/metro.config.js

@@ -15,4 +15,7 @@ const nativeBuildOutputs = /[\\/]android[\\/](build|\.cxx|\.gradle)[\\/].*/;
 
 config.resolver.blockList = [...[].concat(config.resolver.blockList ?? []), ...nativeDirs, nativeBuildOutputs];
 
+// В CI раннер делит 8 ГБ RAM с Gradle: по умолчанию Metro запускает воркер на каждое ядро.
+if (process.env.CI) config.maxWorkers = 2;
+
 module.exports = config;