Session Details are not captured when SCP / SFTPing to an agentless resource

[phall-teleport]

Expected behavior:
Teleport audit log should show what files were uploaded or downloaded

Current behavior:
Teleport audit log shows user requested SFTP subsystem but no further details are logged or session recorded

Bug details:

• Teleport version: 17.2.3

• Recreation steps

• RHEL 8/9 connected using agentless SSH

• Try sftping or scping a test file

• Debug logs

• % sftp -P ${PORT?} -F ssh_config_teleport "${USER?}@${ADDR_NODE?}.${CLUSTER?}"
  Connected to testcloudinstance
  sftp> put file.yaml
  Uploading file.yaml to /home/ec2-user/file.yaml
  file.yaml 100% 93 1.1KB/s 00:00
  sftp> put file2.yml
  Uploading file2.yml to /home/ec2-user/file2yml
  file2.yml 100% 230 2.8KB/s 00:00
  sftp> get foo
  Fetching /home/ec2-user/foo to foo
  sftp> quit

on Teleport Side:
Subsystem Requested
User [user] requested subsystem [sftp] 2025-02-04T18:46:31.781Z