fix: improve SSH agent data collection completeness

- Remove process limit for orphaned agent cleanup
- Increase socket check limit for agent PID validation
- Remove key limit from `ssh-add` output
- Add `sshagent_test.v` to project structure

test_basic.vsh

@@ -192,6 +192,7 @@ python/
 rust_test.v
 rclone/
 qdrant/
+sshagent_test.v
 '
 
 if in_github_actions() {