Fix image query

[AhmetNSimsek]

import siibra
fts = siibra.features.get(siibra.get_template('mni152').get_boundingbox(), siibra.features.cellular.CellbodyStainedSection)
assert len(fts) == 47

But as of d390948 siibra cannot find any.

[codecov-commenter]

Codecov Report

Attention: 1263 lines in your changes are missing coverage. Please review.

Comparison is base (5a0e6b3) 36.81% compared to head (87c4b8b) 53.34%.
Report is 352 commits behind head on main.

Files	Patch %	Lines
siibra/features/feature.py	48.33%	124 Missing ⚠️
siibra/volumes/volume.py	44.33%	118 Missing ⚠️
siibra/core/region.py	57.19%	110 Missing ⚠️
siibra/volumes/parcellationmap.py	19.70%	110 Missing ⚠️
siibra/explorer/url.py	0.00%	107 Missing ⚠️
...bra/features/connectivity/regional_connectivity.py	33.33%	56 Missing ⚠️
siibra/retrieval/datasets.py	49.53%	54 Missing ⚠️
siibra/explorer/util.py	0.00%	51 Missing ⚠️
...a/features/tabular/regional_timeseries_activity.py	39.13%	42 Missing ⚠️
...a/features/tabular/receptor_density_fingerprint.py	2.38%	41 Missing ⚠️
... and 35 more

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Additional details and impacted files

@@             Coverage Diff             @@
##             main     #538       +/-   ##
===========================================
+ Coverage   36.81%   53.34%   +16.52%     
===========================================
  Files          61       69        +8     
  Lines        5421     6600     +1179     
===========================================
+ Hits         1996     3521     +1525     
+ Misses       3425     3079      -346     

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