Add xfail marks to code_v1 integration tests failing with SSHConnectionError

[Copilot]

test_code_with_existing_job[*-code_v1] was consistently failing in CI with SSHConnectionError: Authentication timeout — the same known paramiko auth issue already handled elsewhere via PARAMIKO_SSH_BANNER_BUG.

Changes

• tests/integration/test_code.py
  • Import PARAMIKO_SSH_BANNER_BUG from test_slurm_remote (already used in test_code_v1.py)
  • Apply it to the use_v1=True parametrized case of test_code_with_existing_job via pytest.param:

@pytest.mark.parametrize(
    "use_v1",
    [False, pytest.param(True, marks=[PARAMIKO_SSH_BANNER_BUG])],
    ids=["code", "code_v1"],
)

The code_v1 cases now report as xfail rather than hard failures, consistent with how the same paramiko issue is handled in test_slurm_remote.py and test_code_v1.py.

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[codecov-commenter]

Codecov Report

✅ All modified and coverable lines are covered by tests.
✅ Project coverage is 68.97%. Comparing base (1c4653f) to head (a893002).
⚠️ Report is 1 commits behind head on master.

Additional details and impacted files

@@            Coverage Diff             @@
##           master     #186      +/-   ##
==========================================
- Coverage   74.62%   68.97%   -5.66%     
==========================================
  Files          17       17              
  Lines        2345     2540     +195     
==========================================
+ Hits         1750     1752       +2     
- Misses        595      788     +193     

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