Add gather_summary_observations cli command

[SAKavli]

No description provided.

[codecov-commenter]

Codecov Report

❌ Patch coverage is 23.50000% with 153 lines in your changes missing coverage. Please review.
✅ Project coverage is 89.21%. Comparing base (cc26b7e) to head (91fa806).
⚠️ Report is 9 commits behind head on main.

Files with missing lines	Patch %	Lines
src/ert/gather_summary_observations.py	23.56%	146 Missing ⚠️
src/ert/__main__.py	25.00%	6 Missing ⚠️
src/ert/services/_storage_main.py	0.00%	1 Missing ⚠️

Additional details and impacted files

@@            Coverage Diff             @@
##             main   #13625      +/-   ##
==========================================
- Coverage   89.57%   89.21%   -0.37%     
==========================================
  Files         466      469       +3     
  Lines       32962    33257     +295     
==========================================
+ Hits        29526    29670     +144     
- Misses       3436     3587     +151     

Flag	Coverage Δ
cli-tests	35.56% <23.50%> (-0.14%)	⬇️
fuzz	43.76% <23.50%> (-0.16%)	⬇️
gui-tests	59.47% <23.50%> (-0.30%)	⬇️
performance-and-unit-tests	77.83% <23.50%> (-0.26%)	⬇️
test	45.08% <0.00%> (-0.31%)	⬇️

Flags with carried forward coverage won't be shown. Click here to find out more.

Files with missing lines	Coverage Δ
src/ert/services/_storage_main.py	44.18% <0.00%> (-0.26%)	⬇️
src/ert/__main__.py	85.90% <25.00%> (-1.65%)	⬇️
src/ert/gather_summary_observations.py	23.56% <23.56%> (ø)

... and 7 files with indirect coverage changes

[codspeed-hq]

Merging this PR will not alter performance

✅ 36 untouched benchmarks

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_{Comparing SAKavli:create-obs-summary-key-endpoint (91fa806) with main (332dd15)}

[Copilot]

Pull request overview

Adds an experimental gather_summary_observations CLI command for extracting summary observations from ERT storage into a CSV file.

Changes:

• Adds the new CLI command behind ERT_FEATURE_GATHER_OBS.
• Implements summary-key parsing, storage API startup/access, experiment selection, and CSV export.
• Adds UI tests for feature-flag behavior, CSV generation, and interactive experiment selection.

Reviewed changes

Copilot reviewed 4 out of 4 changed files in this pull request and generated 7 comments.

File	Description
src/ert/__main__.py	Registers the experimental gather_summary_observations subcommand.
src/ert/gather_summary_observations.py	Implements API startup, observation extraction, summary-key conversion, and CSV output.
src/ert/services/_storage_main.py	Logs the served storage directory for API startup discovery.
tests/ert/ui_tests/cli/test_gather_sumary_observations.py	Adds CLI tests for the new command.

[eivindjahren]

There is a couple of things we should probably fix up a little bit before we merge, but other than that there is no need to delay too much as this is behind a featureflag.

[SAKavli]

I am planning on squashing this into a single commit.

[Copilot]

Pull request overview

Copilot reviewed 4 out of 4 changed files in this pull request and generated 5 comments.

[Copilot]

Pull request overview

Copilot reviewed 4 out of 4 changed files in this pull request and generated 3 comments.

[eivindjahren]

🇨🇻