ci: fork each Kotlin/Native compile and give the Gradle daemon 8g (#7441)

.github/ci-gradle.properties

@@ -12,13 +12,17 @@
 org.gradle.daemon=false
 
 # ── Memory ────────────────────────────────────────────────────────────
-# Public-repo hosted Ubuntu x64 runners have 16 GB RAM. Keep Gradle + Kotlin daemon
-# within budget (4g Gradle + 6g Kotlin daemon, leaving room for lint and K/N).
+# Public-repo hosted Ubuntu x64 runners have 16 GB RAM; each -Xmx is a ceiling, not a reservation.
 # Only kotlin.daemon.jvmargs is read from a properties file; kotlin.daemon.jvm.options
-# is a system property. Unset, the daemon inherits org.gradle.jvmargs' 4g and OOMs.
-org.gradle.jvmargs=-Xmx4g -XX:+UseParallelGC -XX:MaxMetaspaceSize=1g -Dfile.encoding=UTF-8
+# is a system property. Unset, the daemon inherits org.gradle.jvmargs and OOMs.
+org.gradle.jvmargs=-Xmx8g -XX:+UseParallelGC -XX:MaxMetaspaceSize=1g -Dfile.encoding=UTF-8
 kotlin.daemon.jvmargs=-Xmx6g -XX:+UseG1GC
 
+# ── Kotlin/Native ─────────────────────────────────────────────────────
+# Each K/N compile gets its own JVM with gradle.properties' kotlin.native.jvmArgs heap. In process,
+# koin-compiler-plugin 1.2.1 keeps every compile's IR reachable from the Gradle daemon until the build ends.
+kotlin.native.disableCompilerDaemon=true
+
 # ── Parallelism ───────────────────────────────────────────────────────
 org.gradle.parallel=true
 org.gradle.workers.max=4

gradle.properties

@@ -15,8 +15,8 @@ kotlin.code.style=official
 # property. Unset, the daemon inherits org.gradle.jvmargs' 8g and over-commits CI runners.
 kotlin.daemon.jvmargs=-Xmx6g -XX\:+UseG1GC -XX\:SoftRefLRUPolicyMSPerMB=1 -XX\:ReservedCodeCacheSize=320m -XX\:+HeapDumpOnOutOfMemoryError
 kotlin.daemon.useFallback=false
-# The Kotlin/Native compiler runs in its own JVM, governed by neither of the heaps
-# above. Its 3g default OOMs compiling every module for iOS from a cold cache.
+# Applies only where kotlin.native.disableCompilerDaemon forks the Kotlin/Native compiler, as CI
+# does; otherwise it runs inside the Gradle daemon and shares org.gradle.jvmargs' heap.
 kotlin.native.jvmArgs=-Xmx5g -XX\:+UseG1GC -XX\:+HeapDumpOnOutOfMemoryError
 # Only macOS can run iosSimulatorArm64Test; this hides KGP's notice about it on Linux and Windows hosts.
 kotlin.native.ignoreDisabledTargets=true