[PWGLF] Add event loss, event splitting, and cut-flow QA

[bhattdurgesh921-sys]

Dear @dmallick2 ,
In this PR we have implemented the event-level correction framework for the Δ analysis by adding the Event Loss and Event Splitting calculations, corresponding QA and cut-flow histograms, and the truth-level INEL > 0 selection.

[github-actions]

O2 linter results: ❌ 0 errors, ⚠️ 4 warnings, 🔕 0 disabled

[alibuild]

Error while checking build/O2Physics/code-check for ee95278 at 2026-08-05 15:03:

## sw/BUILD/O2Physics-code-check-latest/log
--
========== List of issues found ==========
++ echo 'Found 4 errors and 0 warnings.'
Found 4 errors and 0 warnings.
++ [[ 4 -gt 0 ]]
++ cat /sw/BUILD/8c7e36b716d4d4731c67633408a921091b300dcc/O2Physics-code-check/errors.txt
PWGLF/Tasks/Resonances/deltaAnalysis.cxx:80:8: error: constructor does not initialize these fields: pdgDB [cppcoreguidelines-pro-type-member-init,-warnings-as-errors]
PWGLF/Tasks/Resonances/deltaAnalysis.cxx:86:3: error: no header providing "o2::framework::Service" is directly included [misc-include-cleaner,-warnings-as-errors]
PWGLF/Tasks/Resonances/deltaAnalysis.cxx:458:38: error: no header providing "TH1" is directly included [misc-include-cleaner,-warnings-as-errors]
PWGLF/Tasks/Resonances/deltaAnalysis.cxx:1655:59: error: use 'contains' to check for membership [readability-container-contains,-warnings-as-errors]
++ [[ 0 -gt 0 ]]
++ [[ 4 -gt 0 ]]
++ exit 1
--

Full log here.

[alibuild]

Error while checking build/O2Physics/staging for ee95278 at 2026-08-05 08:37:

## sw/BUILD/O2-latest/log
CMake Error in Detectors/Base/CMakeLists.txt:

Full log here.

[alibuild]

Error while checking build/O2Physics/o2 for ee95278 at 2026-08-05 09:47:

## sw/BUILD/O2-latest/log
CMake Error in Detectors/Base/CMakeLists.txt:

Full log here.

[bhattdurgesh921-sys]

Dear @vkucera ,

It appears that the build for this PR is failing due to an issue related to the changes in Detectors/Base/CMakeLists.txt. The build reports the following error:

CMake Error in Detectors/Base/CMakeLists.txt:
Imported target "TGeo2VecGeom::TGeo2VecGeom" includes non-existent path

"/local/workspace/DailyBuilds/DailyO2Physics-slc9/daily-tags.qD5m7JNmUl/slc9_x86-64/ROOT/v6-36-10-alice2-2/include"

in its INTERFACE_INCLUDE_DIRECTORIES. Possible reasons include:

• The path was deleted, renamed, or moved to another location.
• An install or uninstall procedure did not complete successfully.

Could you please have a look at this issue when you have a chance? I would appreciate your help in identifying the cause.

Thank you!

[vkucera]

@bhattdurgesh921-sys The issue is being addressed. Please see the support channel.