fix(dpmodel): support parameter shorthand in DeepEval

[njzjz-bot]

Closes #5662.

Summary

• normalize documented fparam and aparam shorthand into canonical frame-major arrays before automatic batching
• preserve full per-frame inputs while tiling shared frame, per-atom, and all-atom parameter forms
• reject invalid sizes with explicit parameter-shape errors before NumPy reshape failures
• add direct dpmodel backend regressions with two-dimensional parameters, split/unsplit execution, and list input

Why existing tests missed this

Normal public DeepEval/DeepPot calls pass through _standard_input, which already tiles shorthand before invoking a backend and therefore masks the dpmodel adapter defect. Existing .dp consistency coverage uses one frame with full parameter shapes. No regression called the low-level dpmodel backend directly with multiple frames, nor forced automatic batching while passing (natoms, dim_aparam), which the batcher otherwise mistakes for a frame-major array and slices along the atom axis.

Validation

• pytest source/tests/infer/test_dpmodel_deep_eval_params.py -q (8 passed)
• public multi-frame DeepEval compatibility smoke test with forced one-frame batches (passed)
• ruff format . (1 new test file reformatted; 1663 files unchanged)
• ruff check . (passed)
• git diff --check (passed)

Coding agent: Codex
Codex version: codex-cli 0.144.4
Model: gpt-5.6-sol
Reasoning effort: xhigh

[codecov]

Codecov Report

✅ All modified and coverable lines are covered by tests.
✅ Project coverage is 78.33%. Comparing base (6c3b985) to head (1eb3feb).

Additional details and impacted files

@@            Coverage Diff             @@
##           master    #5853      +/-   ##
==========================================
- Coverage   78.58%   78.33%   -0.25%     
==========================================
  Files        1050     1050              
  Lines      120637   120654      +17     
  Branches     4356     4356              
==========================================
- Hits        94801    94515     -286     
- Misses      24278    24579     +301     
- Partials     1558     1560       +2     

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[njzjz]

Possible reviewers based on changed lines, exact file history, and exact-file review history:

• @wanghan-iapcm — 5 commits on changed files; 26 reviews on exact changed files (deepmd/dpmodel/infer/deep_eval.py).
• @iProzd — 3 commits on changed files (deepmd/dpmodel/infer/deep_eval.py).

No review request was made automatically.

Coding agent: Codex
Codex version: codex-cli 0.144.4
Model: gpt-5.6-sol
Reasoning effort: xhigh