Fixed duplicate output issue in main function

VERSION

@@ -1 +1 @@
-0.1.33
+0.1.34

event_miner.c

@@ -589,7 +589,7 @@ static int mine_event(mining_context_t* ctx) {
     
     // Handle results - OUTPUT IMMEDIATELY when solution is found
     if (main_ctx.solution_found && main_ctx.result_event) {
-        // Transfer ownership and output result immediately
+        // Transfer ownership for cleanup
         ctx->result_event = main_ctx.result_event;
         result = 1;  // Success
         
@@ -753,20 +753,14 @@ int main(int argc, char* argv[]) {
     // Start mining
     int mining_result = mine_event(&ctx);
     
-    if (mining_result == 1 && ctx.result_event) {
-        // Success - output mined event
-        char* output_json = cJSON_Print(ctx.result_event);
-        if (output_json) {
-            printf("%s\n", output_json);
-            free(output_json);
-        } else {
-            fprintf(stderr, "Error: Failed to serialize result event\n");
-            exit_code = 1;
-        }
+    if (mining_result == 1) {
+        // Success - result already output by mine_event()
+        exit_code = 0;
     } else if (mining_result == -1) {
-        printf("timeout\n");
+        // Timeout - timeout message already output by mine_event()
         exit_code = 1;
     } else {
+        // Error
         fprintf(stderr, "Error: Mining failed\n");
         exit_code = 1;
     }