Veto flashes outside the bnb time window

[asanchezcastillo]

Description

This PR changes the BFM workflow from many-to-many matching to one-to-many. Based on ICARUS' experience, this has shown to yield a better matching efficiency (see https://sbn-docdb.fnal.gov/cgi-bin/sso/ShowDocument?docid=33862)

Please provide a detailed description of the changes this pull request introduces.

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$${\color{red}\bf{\textrm{IMPORTANT UPDATE June 22nd 2025:}}}$$ If you are making a PR which is intended as a patch for the CURRENT production (which started in Spring 2025), you must make two PRs: one for develop and one for the production/v10_06_00 branch.

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Checklist

• Added at least 1 label from available labels.
• Assigned at least 1 reviewer under Reviewers,
• Assigned all contributers including yourself under Assignees
• Linked any relevant issues under Developement
• Does this PR affect CAF data format? If so, please assign a CAF maintainer (PetrilloAtWork or JosiePaton) as additional reviewer.
• Does this affect the standard workflow?
• Is this PR a patch for the ongoing production? If so, separate PR must also be made for production/v10_06_00 branch!

Relevant PR links (optional)

Does this PR require merging another PR in a different repository (such as sbnanobj/sbnobj etc.)?

Link(s) to docdb describing changes (optional)

Is there a docdb describing the issue this solves or the feature added?

[lynnt20]

Quick check with Fall Validation sample (many-to-many) and Alejandro's one-to-many sample. BCFM one-to-many has slight performance boost (+2.5% efficiency at same purity for the same intime/bcfm score cuts).