ci: exclude faulty Phoenix node atl1-1-01-002-28-0

[sbryngelson]

Description

Node atl1-1-01-002-28-0 on Phoenix is faulty. It caused two distinct CI failures, both landing on that same node:

• Case-optimization (gpu-omp), run 34611616646: all 5 benchmarks (5eq_rk3_weno3_hllc, viscous_weno5_sgb_acoustic, hypo_hll, ibm, igr) died in pre_process with SIGILL ("Illegal instruction: illegal operand", exit 132) at the very first init routine (s_assign_default_values_to_user_inputs, m_global_parameters.fpp:322) — identical across unrelated cases.
• Full Test Suite (gpu-acc), run 34673679046: 23 failures — tolerance mismatches plus "Pressure relaxation produced a non-physical phasic density" MPI_ABORT crashes.

master was intermittently green on the same commit lineage, so this is a bad node rather than a code regression. This PR adds the node to the static Phoenix GPU --exclude list. The runtime preflight doesn't catch it because the faults happen during the actual run, not preflight.

Type of change

• Something else (CI/infrastructure)

Scope

• This PR comprises a single, focused change (one node added to the exclude list).

How Has This Been Tested?

CI-config only; no code paths changed. The existing $node_exclude render (#SBATCH --exclude=...) is unchanged in mechanism.

Checklist

• I ran ./mfc.sh format on modified files — N/A (shell/CI script, no Fortran/Python source changed)
• This PR does not change CFD results

Done with Claude Code.

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Pull request overview

Updates Phoenix GPU CI job submission to avoid scheduling on a known-faulty node that is causing intermittent CI failures.

Changes:

• Adds atl1-1-01-002-28-0 to the static Phoenix GPU --exclude node list.

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[codecov]

Codecov Report

✅ All modified and coverable lines are covered by tests.
✅ Project coverage is 61.26%. Comparing base (dc0aec1) to head (aaca082).

Additional details and impacted files

@@           Coverage Diff           @@
##           master    #1865   +/-   ##
=======================================
  Coverage   61.26%   61.26%           
=======================================
  Files          84       84           
  Lines       22330    22330           
  Branches     3265     3265           
=======================================
  Hits        13680    13680           
  Misses       6207     6207           
  Partials     2443     2443           

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