fix: restore used enrichment vars and silence ptrace unused vars

Co-authored-by: Copilot <223556219+Copilot@users.noreply.github.com>

Author: vsilent

tests/collectors/event_enrichment_test.rs

@@ -114,7 +114,7 @@ fn test_process_tree_enrichment() {
     let enricher = EventEnricher::new().expect("Failed to create enricher");
 
     // Test that we can get parent PID
-    let _ppid = enricher.get_parent_pid(1); // init process
+    let ppid = enricher.get_parent_pid(1); // init process
 
     // PID 1 should exist on Linux
     #[cfg(target_os = "linux")]
@@ -126,7 +126,7 @@ fn test_process_comm_enrichment() {
     let enricher = EventEnricher::new().expect("Failed to create enricher");
 
     // Test that we can get process name
-    let _comm = enricher.get_process_comm(std::process::id());
+    let comm = enricher.get_process_comm(std::process::id());
 
     // Should get some process name
     #[cfg(target_os = "linux")]

tests/collectors/ptrace_capture_test.rs

@@ -35,7 +35,7 @@ mod linux_tests {
 
         std::thread::sleep(Duration::from_millis(100));
 
-        let events = monitor.poll_events();
+        let _events = monitor.poll_events();
 
         // Verify structure ready for ptrace events
         assert!(true);
@@ -53,7 +53,7 @@ mod linux_tests {
 
         std::thread::sleep(Duration::from_millis(100));
 
-        let events = monitor.poll_events();
+        let _events = monitor.poll_events();
 
         // Just verify monitor is working
         assert!(true);