feat: enable Snakemake benchmark files for DSP-running rules

[gipert]

Summary

• Add benchmark: directives to every rule that executes DSP processing (tier build and parameter generation, geds and spms, dsp and psp). Snakemake will write per-rule wall-time / memory TSVs alongside the existing logs.
• New plumbing: tmp_benchmark path, tmp_benchmark_path() helper, and get_pattern_benchmark / get_pattern_benchmark_channel mirroring the existing log helpers.
• Drive-by: a small formatting tweak to pht/fast.py (save_dict_to_files call).

Rules instrumented

• dsp.smk → build_dsp
• psp.smk → build_psp
• dsp_pars_spms.smk → build_pars_dsp_tau_spms
• dsp_pars_geds.smk → build_pars_dsp_pz_geds, build_pars_evtsel_geds, build_pars_dsp_nopt_geds, build_pars_dsp_dplms_geds, build_pars_dsp_eopt_geds
• psp_pars_geds.smk → build_par_psp_fallback, build_pars_psp_dplms_geds_fallback

The SVM training rules (build_svm_dsp_geds, build_pars_dsp_svm_geds, and PSP svm equivalents) are intentionally skipped — they don't run DSP on data.

Test plan

• pytest tests/ passes
• Snakemake parses every rule body (workflow loads up to a pre-existing dummy-cycle catalog issue unrelated to this change)
• On a real production run: confirm generated/tmp/benchmark/<time>/<step>/*.tsv files appear and contain sensible numbers

[codecov]

Codecov Report

❌ Patch coverage is 50.00000% with 3 lines in your changes missing coverage. Please review.
✅ Project coverage is 64.70%. Comparing base (baccae7) to head (4f2ea4c).

Files with missing lines	Patch %	Lines
workflow/src/legenddataflow/methods/patterns.py	50.00%	2 Missing ⚠️
workflow/src/legenddataflow/methods/paths.py	50.00%	1 Missing ⚠️

Additional details and impacted files

@@            Coverage Diff             @@
##             main     #146      +/-   ##
==========================================
- Coverage   64.84%   64.70%   -0.15%     
==========================================
  Files           7        7              
  Lines         623      629       +6     
==========================================
+ Hits          404      407       +3     
- Misses        219      222       +3     

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