Radoslaw Karabowicz

With the current state of this branch, there seems to be no any MC points stored in the output files.

@coderabbitai construct short CHANGELOG message for this PR. @TobiasStockmanns , can you squash into one commit?

Dear Vadim, since we are still not supporting the latest ROOT (6.20), we do not support storing std::array as branch in FairRoot yet. Did you try to use the std::vector...

I have tested FairRoot's private branch without FairSampler::Close() and FairSink::Close() with PandaRoot. I did not observe any crash.

Did you execute the line `export SIMPATH=/path/to/fairsoft/install/directory`?

Is the issue still there?

> > Soooo, what are the benefits of going full type here? > > I guess, the idea would be to have safer-to-use and better-self-documenting function signatures (and call sites),...

@ChristianTackeGSI, can you add an entry in the changelog? For some users that change may be worth mentioning. I have tested the PR with PandaRoot.

> Please rebase and squash things. Done.

Problem has been fixed.