[PWGCF] FU: fixing histos for prompt fraction; process to store only reco events in MC truth

[kgwizdzi]

Changes in femtoUniverseProducerMCTruthTask.cxx:

• new process function which store only the MC Truth events which are reconstructed - processTrackMcOnlyRecoColl
• new function to check the reconstructed collisions - checkMcRecoCollisions
• possibility to store PDG code of mother particle - confStoreMotherPDG
• fixing clang-tidy errors/warnings

Changes in femtoUniversePairTaskTrackD0.cxx:

• new configurables to set the nSigma TPC and combined values separately
• unused configurables removed
• unused process functions removed
• possibility to cut on the non-prompt score when selecting the D0 candidates added
• nSigma histograms' ranges fixed
• new THnSparse for D0 and D0bar candidates added (implemented for prompt fraction estimation)
• clang-tidy errors/warnings fixed

[github-actions]

O2 linter results: ❌ 0 errors, ⚠️ 2 warnings, 🔕 0 disabled

[alibuild]

Error while checking build/O2Physics/code-check for 990e78f at 2026-07-14 18:59:

## sw/BUILD/O2Physics-code-check-latest/log
--
========== List of issues found ==========
++ echo 'Found 13 errors and 0 warnings.'
Found 13 errors and 0 warnings.
++ [[ 13 -gt 0 ]]
++ cat /sw/BUILD/18cf69d2e64e8e8ba7fa249f431dc35a1db9e9fc/O2Physics-code-check/errors.txt
PWGCF/FemtoUniverse/TableProducer/femtoUniverseProducerMCTruthTask.cxx:188:7: error: do not use 'else' after 'return' [readability-else-after-return,-warnings-as-errors]
PWGCF/FemtoUniverse/TableProducer/femtoUniverseProducerMCTruthTask.cxx:194:33: error: the parameter 'particle' is copied for each invocation but only used as a const reference; consider making it a const reference [performance-unnecessary-value-param,-warnings-as-errors]
PWGCF/FemtoUniverse/TableProducer/femtoUniverseProducerMCTruthTask.cxx:198:7: error: do not use 'else' after 'return' [readability-else-after-return,-warnings-as-errors]
PWGCF/FemtoUniverse/TableProducer/femtoUniverseProducerMCTruthTask.cxx:203:12: error: the variable 'motherparticleMC' is copy-constructed from a const reference but is only used as const reference; consider making it a const reference [performance-unnecessary-copy-initialization,-warnings-as-errors]
PWGCF/FemtoUniverse/TableProducer/femtoUniverseProducerMCTruthTask.cxx:310:17: error: no header providing "std::set" is directly included [misc-include-cleaner,-warnings-as-errors]
PWGCF/FemtoUniverse/Tasks/femtoUniversePairTaskTrackD0.cxx:319:7: error: do not use 'else' after 'return' [readability-else-after-return,-warnings-as-errors]
PWGCF/FemtoUniverse/Tasks/femtoUniversePairTaskTrackD0.cxx:340:7: error: do not use 'else' after 'return' [readability-else-after-return,-warnings-as-errors]
PWGCF/FemtoUniverse/Tasks/femtoUniversePairTaskTrackD0.cxx:361:7: error: do not use 'else' after 'return' [readability-else-after-return,-warnings-as-errors]
PWGCF/FemtoUniverse/Tasks/femtoUniversePairTaskTrackD0.cxx:787:11: error: variable 'tpcNSigmaPr' is not initialized [cppcoreguidelines-init-variables,-warnings-as-errors]
PWGCF/FemtoUniverse/Tasks/femtoUniversePairTaskTrackD0.cxx:787:24: error: variable 'tofNSigmaPr' is not initialized [cppcoreguidelines-init-variables,-warnings-as-errors]
PWGCF/FemtoUniverse/Tasks/femtoUniversePairTaskTrackD0.cxx:787:37: error: variable 'tpcNSigmaPi' is not initialized [cppcoreguidelines-init-variables,-warnings-as-errors]
PWGCF/FemtoUniverse/Tasks/femtoUniversePairTaskTrackD0.cxx:787:50: error: variable 'tofNSigmaPi' is not initialized [cppcoreguidelines-init-variables,-warnings-as-errors]
PWGCF/FemtoUniverse/Tasks/femtoUniversePairTaskTrackD0.cxx:787:63: error: variable 'tpcNSigmaKa' is not initialized [cppcoreguidelines-init-variables,-warnings-as-errors]
++ [[ 0 -gt 0 ]]
++ [[ 13 -gt 0 ]]
++ exit 1
--

Full log here.