Resolve Picocli InitializationException in release builds (#645)

R8 minification was aggressively stripping Picocli annotations (@command, @option) and renaming command classes, causing reflection to fail at runtime.

We add targeted ProGuard rules to ensure CLI stability:
- Preserved attributes required for reflection and annotations.
- Protected any class or member annotated with Picocli markers.
- Kept internal Picocli classes required for standard help mixins.
- Retained Gson IPC data models (CliRequest/Response) to prevent socket serialization failures in release builds.

Co-authored-by: JingMatrix <jingmatrix@gmail.com>

Author: AnatolyJacobs

daemon/proguard-rules.pro

@@ -7,6 +7,30 @@
 -keepclasseswithmembers class org.matrix.vector.daemon.Cli {
     public static void main(java.lang.String[]);
 }
+
+
+# Keep IPC data models intact so Gson serializes the correct JSON keys
+-keep class org.matrix.vector.daemon.CliRequest { *; }
+-keep class org.matrix.vector.daemon.CliResponse { *; }
+
+# Preserve annotations, generic signatures, and inner classes (critical for picocli reflection)
+-keepattributes *Annotation*, Signature, InnerClasses, EnclosingMethod
+
+# Keep internal Picocli classes required for `mixinStandardHelpOptions = true`
+-keep class picocli.CommandLine$AutoHelpMixin { *; }
+-keep class picocli.CommandLine$HelpCommand { *; }
+
+# Keep ANY class (and its constructor) annotated with @Command
+-keep @picocli.CommandLine$Command class * {
+    <init>(...);
+}
+
+# Keep ANY field/method using a Picocli annotation (@Option, @Parameters, etc.)
+-keepclassmembers class * {
+    @picocli.CommandLine$* *;
+}
+
+
 -keepclasseswithmembers class org.matrix.vector.daemon.env.LogcatMonitor {
     private int refreshFd(boolean);
 }