fix(cpp): increase meta val size

Author: jhen0409

android/src/main/jni.cpp

@@ -205,7 +205,7 @@ Java_com_rnllama_LlamaContext_loadModelDetails(
     for (int i = 0; i < count; i++) {
         char key[256];
         llama_model_meta_key_by_index(llama->model, i, key, sizeof(key));
-        char val[256];
+        char val[2048];
         llama_model_meta_val_str_by_index(llama->model, i, val, sizeof(val));
 
         putString(env, meta, key, val);

ios/RNLlamaContext.mm

@@ -102,7 +102,7 @@ - (NSDictionary *)modelInfo {
     for (int i = 0; i < count; i++) {
         char key[256];
         llama_model_meta_key_by_index(llama->model, i, key, sizeof(key));
-        char val[256];
+        char val[2048];
         llama_model_meta_val_str_by_index(llama->model, i, val, sizeof(val));
 
         NSString *keyStr = [NSString stringWithUTF8String:key];