[PWGLF,PWGMM] Add a new task for vertex-based vdM scan analyses

[mjkim525]

This PR introduces a new lumiVertex analysis task for vertex-based van der Meer scan analyses such as Length-Scale Calibration, Non-factorization effect correction.

The task is based on the existing PWGMM/Lumi/Tasks/lumi.cxx workflow and is designed to store the primary-vertex and bunch-crossing information needed for luminosity studies based on reconstructed collision vertices.

[github-actions]

O2 linter results: ❌ 0 errors, ⚠️ 0 warnings, 🔕 3 disabled

[alibuild]

Error while checking build/O2Physics/code-check for 1a963b5 at 2026-08-07 05:07:

## sw/BUILD/O2Physics-code-check-latest/log
--
========== List of issues found ==========
++ echo 'Found 5 errors and 0 warnings.'
Found 5 errors and 0 warnings.
++ [[ 5 -gt 0 ]]
++ cat /sw/BUILD/8b1be657340555923db73971d79fbc3d4c32ca10/O2Physics-code-check/errors.txt
PWGMM/Lumi/Tasks/lumiVertex.cxx:22:1: error: included header TrackSelectionTables.h is not used directly [misc-include-cleaner,-warnings-as-errors]
PWGMM/Lumi/Tasks/lumiVertex.cxx:116:8: error: constructor does not initialize these fields: ccdb [cppcoreguidelines-pro-type-member-init,-warnings-as-errors]
PWGMM/Lumi/Tasks/lumiVertex.cxx:283:12: error: implicit conversion 'int' -> 'bool' [readability-implicit-bool-conversion,-warnings-as-errors]
PWGMM/Lumi/Tasks/lumiVertex.cxx:284:12: error: implicit conversion 'int' -> 'bool' [readability-implicit-bool-conversion,-warnings-as-errors]
PWGMM/Lumi/Tasks/lumiVertex.cxx:690:13: error: use auto when initializing with a cast to avoid duplicating the type name [modernize-use-auto,-warnings-as-errors]
++ [[ 0 -gt 0 ]]
++ [[ 5 -gt 0 ]]
++ exit 1
--

Full log here.

[jgcn]

Hi
I see still some errors. Unfortunately, I am not a C++ expert so I have no concrete suggestions. Could you please have a look to see if you manage to solve at least some of them? If you do not manage, and you assure me that these are more warnings than errors, I could approve the new code. (Unless someone else in the list of people that grant approvals, and who have a lot more C++ knowledge than I, has another opinion .)
have a nice day
guillermo