Revert "fix: sanitize host and username values before base64 encoding in secrets"

[jangel97]

Summary

• Reverts fix: remove trailing newline from connection detail output files #799 — the tr -d '\n\r' was applied to all base64 -w0 lines including id_rsa, which strips internal newlines from PEM private keys and breaks SSH authentication (Load key "id_rsa": error in libcrypto)
• Will follow up with a corrected fix that only trims single-line values (host, username, passwords) and leaves multi-line values (id_rsa, kubeconfig) untouched

[adrianriobo]

LGTM

[adrianriobo]

LGTM