Add more marginalization options

[andreicuceu]

No description provided.

[Copilot]

Pull request overview

Adds configuration options to change how small-scale marginalization templates are handled during fitting, including an on-the-fly template-coefficient fit mode and an option to build templates that match data-bin structure; also adds a small CLI runner.

Changes:

• Add control.marginalize_in_fit to optionally fit marginalization-template coefficients on the fly during chi2.
• Add model.marginalize-match-data-bins and plumb it through config building and template construction.
• Add bin/run_vega.py convenience entrypoint.

Reviewed changes

Copilot reviewed 4 out of 5 changed files in this pull request and generated 9 comments.

Show a summary per file

File	Description
vega/vega_interface.py	Adds marginalize_in_fit wiring, applies fitted template corrections in chi2, and guards global-cov updates when cov_marg_update is None.
vega/data.py	Extends Data init to support marginalize_in_fit by optionally skipping covariance updates and adjusting the coefficient-solver setup.
vega/correlation_item.py	Adds marginalize-match-data-bins and a new template-building path that groups model bins by nearest data bins.
vega/build_config.py	Adds the new marginalize-match-data-bins option to generated configs.
bin/run_vega.py	Adds a simple CLI wrapper around vega.run_vega.

---

💡 Add Copilot custom instructions for smarter, more guided reviews. Learn how to get started.

[codecov]

Codecov Report

❌ Patch coverage is 11.36364% with 39 lines in your changes missing coverage. Please review.
✅ Project coverage is 36.90%. Comparing base (ed7849e) to head (c57d500).
⚠️ Report is 10 commits behind head on master.

Files with missing lines	Patch %	Lines
vega/correlation_item.py	7.14%	13 Missing ⚠️
vega/vega_interface.py	13.33%	10 Missing and 3 partials ⚠️
vega/data.py	15.38%	11 Missing ⚠️
vega/build_config.py	0.00%	2 Missing ⚠️

Additional details and impacted files

@@            Coverage Diff             @@
##           master     #154      +/-   ##
==========================================
- Coverage   37.12%   36.90%   -0.23%     
==========================================
  Files          30       30              
  Lines        4180     4208      +28     
  Branches      788      798      +10     
==========================================
+ Hits         1552     1553       +1     
- Misses       2470     2494      +24     
- Partials      158      161       +3     

☔ View full report in Codecov by Sentry.
📢 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.