[PWGEM/PhotonMeson] Add Dalitz electron efficiency task

[lgansbartl]

No description provided.

[github-actions]

O2 linter results: ❌ 0 errors, ⚠️ 25 warnings, 🔕 0 disabled

[alibuild]

Error while checking build/O2Physics/staging for 4dd4040 at 2026-10-15 18:22:

No log files found

Full log here.

[alibuild]

Error while checking build/O2Physics/o2 for 4dd4040 at 2026-10-15 18:27:

No log files found

Full log here.

[alibuild]

Error while checking build/O2Physics/code-check for 4dd4040 at 2026-10-15 20:09:

## sw/BUILD/O2Physics-code-check-latest/log
--
========== List of issues found ==========
++ echo 'To reproduce the results below locally, run: '\''aliBuild build O2Physics-code-check -e ALIBUILD_BASE_HASH=upstream/master'\''.'
To reproduce the results below locally, run: 'aliBuild build O2Physics-code-check -e ALIBUILD_BASE_HASH=upstream/master'.
++ echo 'To apply all automatic fixes, add the '\''-e O2PHYSICS_CHECKER_FIX=1'\'' option.'
To apply all automatic fixes, add the '-e O2PHYSICS_CHECKER_FIX=1' option.
++ echo 'See the documentation for more details at: <https://aliceo2group.github.io/analysis-framework/docs/tools/#running-with-o2physics-code-check>.'
See the documentation for more details at: <https://aliceo2group.github.io/analysis-framework/docs/tools/#running-with-o2physics-code-check>.
++ echo 'Found 31 errors and 0 warnings.'
Found 31 errors and 0 warnings.
++ [[ 31 -gt 0 ]]
++ cat /sw/BUILD/151de045093cf525b55e498d448abb59db729601/O2Physics-code-check/errors.txt
PWGEM/PhotonMeson/Tasks/dileptonEffiForDalitzSkimmer.cxx:17:1: error: included header MCUtilities.h is not used directly [misc-include-cleaner,-warnings-as-errors]
PWGEM/PhotonMeson/Tasks/dileptonEffiForDalitzSkimmer.cxx:20:1: error: included header BasicCCDBManager.h is not used directly [misc-include-cleaner,-warnings-as-errors]
PWGEM/PhotonMeson/Tasks/dileptonEffiForDalitzSkimmer.cxx:21:1: error: included header PhysicsConstants.h is not used directly [misc-include-cleaner,-warnings-as-errors]
PWGEM/PhotonMeson/Tasks/dileptonEffiForDalitzSkimmer.cxx:22:1: error: included header GRPMagField.h is not used directly [misc-include-cleaner,-warnings-as-errors]
PWGEM/PhotonMeson/Tasks/dileptonEffiForDalitzSkimmer.cxx:23:1: error: included header GRPObject.h is not used directly [misc-include-cleaner,-warnings-as-errors]
PWGEM/PhotonMeson/Tasks/dileptonEffiForDalitzSkimmer.cxx:24:1: error: included header Propagator.h is not used directly [misc-include-cleaner,-warnings-as-errors]
PWGEM/PhotonMeson/Tasks/dileptonEffiForDalitzSkimmer.cxx:25:1: error: included header ASoAHelpers.h is not used directly [misc-include-cleaner,-warnings-as-errors]
PWGEM/PhotonMeson/Tasks/dileptonEffiForDalitzSkimmer.cxx:27:1: error: included header AnalysisHelpers.h is not used directly [misc-include-cleaner,-warnings-as-errors]
PWGEM/PhotonMeson/Tasks/dileptonEffiForDalitzSkimmer.cxx:30:1: error: included header DataTypes.h is not used directly [misc-include-cleaner,-warnings-as-errors]
PWGEM/PhotonMeson/Tasks/dileptonEffiForDalitzSkimmer.cxx:38:1: error: included header Vector4Dfwd.h is not used directly [misc-include-cleaner,-warnings-as-errors]
PWGEM/PhotonMeson/Tasks/dileptonEffiForDalitzSkimmer.cxx:53:64: error: no header providing "o2::aod::TracksDCA" is directly included [misc-include-cleaner,-warnings-as-errors]
PWGEM/PhotonMeson/Tasks/dileptonEffiForDalitzSkimmer.cxx:54:33: error: no header providing "o2::aod::pidTPCFullEl" is directly included [misc-include-cleaner,-warnings-as-errors]
PWGEM/PhotonMeson/Tasks/dileptonEffiForDalitzSkimmer.cxx:54:52: error: no header providing "o2::aod::pidTPCFullPi" is directly included [misc-include-cleaner,-warnings-as-errors]
PWGEM/PhotonMeson/Tasks/dileptonEffiForDalitzSkimmer.cxx:54:71: error: no header providing "o2::aod::pidTPCFullKa" is directly included [misc-include-cleaner,-warnings-as-errors]
PWGEM/PhotonMeson/Tasks/dileptonEffiForDalitzSkimmer.cxx:54:90: error: no header providing "o2::aod::pidTPCFullPr" is directly included [misc-include-cleaner,-warnings-as-errors]
PWGEM/PhotonMeson/Tasks/dileptonEffiForDalitzSkimmer.cxx:55:33: error: no header providing "o2::aod::pidTOFFullEl" is directly included [misc-include-cleaner,-warnings-as-errors]
PWGEM/PhotonMeson/Tasks/dileptonEffiForDalitzSkimmer.cxx:55:52: error: no header providing "o2::aod::pidTOFFullPi" is directly included [misc-include-cleaner,-warnings-as-errors]
PWGEM/PhotonMeson/Tasks/dileptonEffiForDalitzSkimmer.cxx:55:71: error: no header providing "o2::aod::pidTOFFullKa" is directly included [misc-include-cleaner,-warnings-as-errors]
PWGEM/PhotonMeson/Tasks/dileptonEffiForDalitzSkimmer.cxx:55:90: error: no header providing "o2::aod::pidTOFFullPr" is directly included [misc-include-cleaner,-warnings-as-errors]
PWGEM/PhotonMeson/Tasks/dileptonEffiForDalitzSkimmer.cxx:56:33: error: no header providing "o2::aod::pidTOFbeta" is directly included [misc-include-cleaner,-warnings-as-errors]
PWGEM/PhotonMeson/Tasks/dileptonEffiForDalitzSkimmer.cxx:56:50: error: no header providing "o2::aod::TOFSignal" is directly included [misc-include-cleaner,-warnings-as-errors]
PWGEM/PhotonMeson/Tasks/dileptonEffiForDalitzSkimmer.cxx:56:66: error: no header providing "o2::aod::TOFEvTime" is directly included [misc-include-cleaner,-warnings-as-errors]
PWGEM/PhotonMeson/Tasks/dileptonEffiForDalitzSkimmer.cxx:58:65: error: no header providing "o2::aod::mcTPCTuneOnData" is directly included [misc-include-cleaner,-warnings-as-errors]
PWGEM/PhotonMeson/Tasks/dileptonEffiForDalitzSkimmer.cxx:67:39: error: no header providing "o2::aod::PMEvents" is directly included [misc-include-cleaner,-warnings-as-errors]
PWGEM/PhotonMeson/Tasks/dileptonEffiForDalitzSkimmer.cxx:67:146: error: no header providing "o2::aod::EmMagFields" is directly included [misc-include-cleaner,-warnings-as-errors]
PWGEM/PhotonMeson/Tasks/dileptonEffiForDalitzSkimmer.cxx:193:14: error: variable 'mcIndexWithMaxTracks' set but not used [clang-diagnostic-unused-but-set-variable,-warnings-as-errors]
PWGEM/PhotonMeson/Tasks/dileptonEffiForDalitzSkimmer.cxx:208:9: error: Value stored to 'mcIndexWithMaxTracks' is never read [clang-analyzer-deadcode.DeadStores,-warnings-as-errors]
PWGEM/PhotonMeson/Tasks/dileptonEffiForDalitzSkimmer.cxx:272:14: error: variable 'mcIndexWithMaxTracks' set but not used [clang-diagnostic-unused-but-set-variable,-warnings-as-errors]
PWGEM/PhotonMeson/Tasks/dileptonEffiForDalitzSkimmer.cxx:273:14: error: variable 'numOkMc' set but not used [clang-diagnostic-unused-but-set-variable,-warnings-as-errors]
PWGEM/PhotonMeson/Tasks/dileptonEffiForDalitzSkimmer.cxx:274:14: error: variable 'numNotOkMc' set but not used [clang-diagnostic-unused-but-set-variable,-warnings-as-errors]
PWGEM/PhotonMeson/Tasks/dileptonEffiForDalitzSkimmer.cxx:288:9: error: Value stored to 'mcIndexWithMaxTracks' is never read [clang-analyzer-deadcode.DeadStores,-warnings-as-errors]
++ [[ 0 -gt 0 ]]
++ [[ 31 -gt 0 ]]
++ exit 1
--

[0 more errors; see full log]

Full log here.

[vkucera]

Hi @lgansbartl , Since you are adding a new file, please fix all reported errors and warnings so that the CI reports only new issues in the future PRs.

[mhemmer-cern]

Converting to draft to stop test machines from retesting till the next commit with the fixes is coming.