Fix attrs-expr bug bounding_box_query points

[LucaMarconato]

Closes #1037

Simple PR:

• removes to_dask_array() and calls compute right away (it would be called later in the code anyway);
• improve error messages, typing and check on related parts of the codebase.

Please @melonora do a post-merge double check.

[codecov]

Codecov Report

❌ Patch coverage is 77.77778% with 2 lines in your changes missing coverage. Please review.
✅ Project coverage is 92.19%. Comparing base (428791b) to head (bb7372a).
⚠️ Report is 13 commits behind head on main.

Files with missing lines	Patch %	Lines
src/spatialdata/_core/query/spatial_query.py	77.77%	2 Missing ⚠️

Additional details and impacted files

@@            Coverage Diff             @@
##             main    #1038      +/-   ##
==========================================
- Coverage   92.20%   92.19%   -0.02%     
==========================================
  Files          49       49              
  Lines        7547     7545       -2     
==========================================
- Hits         6959     6956       -3     
- Misses        588      589       +1     

Files with missing lines	Coverage Δ
src/spatialdata/_core/query/spatial_query.py	95.17% <77.77%> (-0.30%)	⬇️

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