Changing FIA-API vesuvio script to allow summing multiple runs

[esmith1729]

Closes #587

Description

[codecov]

Codecov Report

✅ All modified and coverable lines are covered by tests.
✅ Project coverage is 96.29%. Comparing base (d15484e) to head (5092263).

Additional details and impacted files

@@            Coverage Diff             @@
##             main     #596      +/-   ##
==========================================
+ Coverage   96.28%   96.29%   +0.01%     
==========================================
  Files          48       48              
  Lines        1882     1890       +8     
==========================================
+ Hits         1812     1820       +8     
  Misses         70       70              

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[Copilot]

Pull request overview

This PR updates the VESUVIO script transform to support multiple run numbers by turning list inputs into the correct Mantid-style runno string, and it adds tests to cover the new behaviors.

Changes:

• Extend VesuvioTransform.apply to accept job.inputs["runno"] as either a scalar or a list and convert lists into either a contiguous range string ("start-end") or a comma-separated list string ("a,b,c").
• Preserve existing behavior for single run numbers (string or scalar) by normalizing everything through a computed runno_str.
• Add three new tests in test_vesuvio_transforms.py to validate contiguous multi-run lists, non-contiguous multi-run lists, and single-element lists.

Reviewed changes

Copilot reviewed 2 out of 2 changed files in this pull request and generated no comments.

File	Description
fia_api/scripts/transforms/vesuvio_transform.py	Implements runno normalization logic to handle lists of run numbers, emitting either range or comma-separated strings and wiring this into the existing transform loop.
test/scripts/transforms/test_vesuvio_transforms.py	Adds unit tests verifying that VESUVIO transforms produce the correct runno line for contiguous lists, non-contiguous lists, and single-element lists, plus existing single-run behavior.

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