Draft: cbmreco cosmetics && running cbmreco offline on slurm

• cosmetics in cbmreco
• scripts to submit cbmreco on slurm in offline mode

NB depends on !2091

added Online QA beamtime labels

requested review from @p.-a.loizeau

assigned to @s.zharko

changed the description

changed title from Draft: Beamtime2025 replay cosmetics to Draft: cbmreco cosmetics && running cbmreco offline on slurm

Dear @d.smith, @fweig, @f.uhlig, @v.friese, @p.-a.loizeau, @se.gorbunov, @s.zharko,

you have been identified as code owner of at least one file which was changed with this merge request.

Please check the changes and approve them or request changes.

added CodeOwners label