WIP: Include spans fro dark storage

[HakonSohoel]

Issue
Resolves equinor/scout#1157

Approach
Short description of the approach

(Screenshot of new behavior in GUI if applicable)

• PR title captures the intent of the changes, and is fitting for release notes.
• Added appropriate release note label
• Commit history is consistent and clean, in line with the contribution guidelines.
• Make sure unit tests pass locally after every commit (git rebase -i main --exec 'pytest tests/ert/unit_tests -n logical -m "not integration_test"')

When applicable

• When there are user facing changes: Updated documentation
• New behavior or changes to existing untested code: Ensured that unit tests are added (See Ground Rules).
• Large PR: Prepare changes in small commits for more convenient review
• Bug fix: Add regression test for the bug
• Bug fix: Create Backport PR to latest release

[codspeed-hq]

CodSpeed Performance Report

Merging #9535 will improve performances by 95.53%

_{Comparing HakonSohoel:Include-spans-for-dark-storage (9d7ee1b) with main (ebe548e)}

Summary

⚡ 2 improvements
✅ 21 untouched benchmarks

Benchmarks breakdown

	Benchmark	main	HakonSohoel:Include-spans-for-dark-storage	Change
⚡	test_load_from_context[gen_x: 20, sum_x: 20 reals: 10]	7.1 ms	6.5 ms	+10.17%
⚡	test_gui_snapshot	3.5 s	1.8 s	+95.53%

[codecov-commenter]

Codecov Report

Attention: Patch coverage is 38.23529% with 21 lines in your changes missing coverage. Please review.

Project coverage is 91.87%. Comparing base (5ae6ece) to head (9d7ee1b).
Report is 2 commits behind head on main.

Files with missing lines	Patch %	Lines
src/ert/services/_storage_main.py	30.00%	21 Missing ⚠️

Additional details and impacted files

@@            Coverage Diff             @@
##             main    #9535      +/-   ##
==========================================
+ Coverage   91.86%   91.87%   +0.01%     
==========================================
  Files         433      433              
  Lines       26768    26791      +23     
==========================================
+ Hits        24590    24615      +25     
+ Misses       2178     2176       -2     

Flag	Coverage Δ
cli-tests	39.74% <5.88%> (-0.04%)	⬇️
everest-models-test	34.64% <0.00%> (-0.04%)	⬇️
gui-tests	74.41% <11.76%> (+2.26%)	⬆️
integration-test	37.20% <0.00%> (-0.01%)	⬇️
performance-tests	51.94% <11.76%> (-0.03%)	⬇️
test	40.44% <0.00%> (-0.04%)	⬇️
unit-tests	74.12% <38.23%> (-0.02%)	⬇️

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