CI: pin builds to the desktop runner

The RN/NDK build exhausted the 8GB VPS (whole docker stack went down
2026-08-08); marcusDesktop (32 threads) now handles these, and jobs
queue while it is offline.

Co-Authored-By: Claude Fable 5 <noreply@anthropic.com>

.gitea/workflows/release.yml

@@ -6,7 +6,9 @@ on:
 
 jobs:
   build:
-    runs-on: ubuntu-latest
+    # RN/NDK builds need ~6GB and once took down the 8GB VPS — desktop runner only.
+    # Jobs queue while the desktop is offline.
+    runs-on: desktop
     container:
       image: eclipse-temurin:21-jdk
     steps:

plugins/with-release-signing.js

@@ -40,6 +40,17 @@ module.exports = function withReleaseSigning(config) {
     if (jdk && !cfg.modResults.some((p) => p.key === 'org.gradle.java.home')) {
       cfg.modResults.push({ type: 'property', key: 'org.gradle.java.home', value: jdk });
     }
+    /* use every core: parallel module builds + build cache */
+    const set = (key, value) => {
+      const hit = cfg.modResults.find((p) => p.key === key);
+      if (hit) hit.value = value;
+      else cfg.modResults.push({ type: 'property', key, value });
+    };
+    set('org.gradle.parallel', 'true');
+    set('org.gradle.caching', 'true');
+    set('org.gradle.configuration-cache', 'false');
+    set('org.gradle.workers.max', String(os.cpus().length));
+    set('org.gradle.jvmargs', '-Xmx6g -XX:MaxMetaspaceSize=1g');
     return cfg;
   });
   return withAppBuildGradle(config, (cfg) => {