[J-Endres]

• fix: phantoms with zero size along an axis (2D, single voxel) no longer crash the prepass with Encountered a NaN while sorting + dists by mag when simulating normalized-gradient sequences; such axes are not scaled
• add fid_graph: builds a graph with only z0 and one + state per repetition, as an alternative to compute_graph without running the prepass
• fix: import_pulseq_rs stores pulse.freq_offset in Hz, matching the pydissect importer (was rad/s) (fix: Match unit convention of pulse.freq_offset between pydissect and import_pulseq_rs to Hz #197)
• speed up import_pulseq_rs by integrating gradient moments in NumPy instead of once per event, ~4-13x faster on typical sequences (Speed up pulseq_rs import by integrating gradient moments in NumPy. #194)
• fix: cast values to native Python floats before writing the MRD header, so the XML no longer contains np.float64(...) (Cast values to native float before writing mrd header #189)
• fix: update pulseq-rs for full rotation extension support and soft-delay default

[github-actions]

Simulation test: main (before) vs. this PR (after)

Sequence	Status	max mag NRMSE	max phase RMSE	max runtime Δ
mr0_DREAM_STE_seq	✅	0.00e+00	0.00e+00	+0.5%
mr0_DWI_SE_EPI	✅	0.00e+00	0.00e+00	+1.5%
mr0_EPI_2D_seq	✅	0.00e+00	0.00e+00	+0.5%
mr0_FID_seq	✅	0.00e+00	0.00e+00	+2.4%
mr0_FLASH_2D_seq	✅	0.00e+00	0.00e+00	+5.7%
mr0_GRE_to_FLASH	⚠️	–	–	–
mr0_RARE_2D_seq	✅	0.00e+00	0.00e+00	+2.0%
mr0_SE_CPMG_seq	✅	0.00e+00	0.00e+00	+6.7%
mr0_STE_3pulses_5echoes_seq	✅	0.00e+00	0.00e+00	+5.9%
mr0_TSE_2D_multi_shot_seq	✅	0.00e+00	0.00e+00	+4.2%
mr0_bSSFP_2D_seq	✅	0.00e+00	0.00e+00	+7.1%
mr0_diffusion_prep_STEAM_2D_seq	✅	0.00e+00	0.00e+00	+1.3%

✅ mr0_DREAM_STE_seq: All tests passed.

✅ mr0_DWI_SE_EPI: All tests passed.

✅ mr0_EPI_2D_seq: All tests passed.

✅ mr0_FID_seq: All tests passed.

✅ mr0_FLASH_2D_seq: All tests passed.

⚠️ mr0_GRE_to_FLASH: No comparison possible: [Errno 2] No such file or directory: '/home/runner/work/MRzero-Core/MRzero-Core/tests/simulation_test/ref_files/mr0_GRE_to_FLASH.seq.npz'

✅ mr0_RARE_2D_seq: All tests passed.

✅ mr0_SE_CPMG_seq: All tests passed.

✅ mr0_STE_3pulses_5echoes_seq: All tests passed.

✅ mr0_TSE_2D_multi_shot_seq: All tests passed.

✅ mr0_bSSFP_2D_seq: All tests passed.

✅ mr0_diffusion_prep_STEAM_2D_seq: All tests passed.

Workflow run — raw .npz data is attached as artifacts.