ENH: One step interpolation for CIFTI subcortical structures

[mgxd]

Resample BOLD directly into MNI152NLin6Asym for the CIFTI subcortical grayordinates, rather than native -> MNIInfant -> per roi MNI152NLin6Asym realignment, and add a QC figure.

Formerly, we resampled BOLD to MNIInfant, then ran a separate per-structure MNIInfant -> MNI152NLin6Asym refinement to reach the HCP grayordinate space. The anatomical workflow already produces a direct anat -> MNI152NLin6Asym transform (optionally with multi-step registration), so BOLD can resample straight to MNI152NLin6Asym and label subcortical grayordinates from the HCP dseg. Initial comparisons show improvement, but additional testing is needed.

Immediate improvements:

• single interpolation: timeseries is only interpolated once (native -> MNI152NLin6Asym), reducing spatial blurring and added temporal autocorrelation.
• less compute, memory, and disk: drops the intermediate MNIInfant BOLD resample and the per-ROI registration/resample/smooth stage (e.g. the FLIRT node alone reserved ~4 GB), cutting nodes, working-directory footprint, and peak memory.

[codecov]

Codecov Report

❌ Patch coverage is 50.79365% with 31 lines in your changes missing coverage. Please review.
✅ Project coverage is 62.22%. Comparing base (a2f98a0) to head (02f714e).
⚠️ Report is 7 commits behind head on master.

Files with missing lines	Patch %	Lines
nibabies/interfaces/reports.py	27.90%	31 Missing ⚠️

Additional details and impacted files

@@            Coverage Diff             @@
##           master     #558      +/-   ##
==========================================
- Coverage   62.69%   62.22%   -0.47%     
==========================================
  Files          74       73       -1     
  Lines        7237     7212      -25     
  Branches      891      887       -4     
==========================================
- Hits         4537     4488      -49     
- Misses       2428     2455      +27     
+ Partials      272      269       -3     

☔ View full report in Codecov by Harness.
📢 Have feedback on the report? Share it here.

🚀 New features to boost your workflow:

• ❄️ Test Analytics: Detect flaky tests, report on failures, and find test suite problems.