[PWGLF] EMCal in sigma0 analysis

[gianniliveraro]

This PR mainly includes the option to reconstruct and analyze sigma0 candidates using EMCal information (provided by the emcalCorrectionTask). For this, a set of dedicated process functions / tables / histograms / etc were added/modified to process both DATA and MC. The option to use only PCM photons remains untouched.

These changes are for a simple feasibility study. Hence, the code should be further improved in a future PR.

• Other minor fixes/changes:
  • safeguards in v0 pairing
  • Better handling of v0 and mcparticle indices in sigma0cores/sigma0mccores tables.
  • Adds a dedicated process function for QA/comparison of PCM and EMCal photons
  • Adds the PDG code of V0 daughters in the sigma0mccores table

@Oussama3030 and @ddobrigk for your information :)

[alibuild]

Error while checking build/O2Physics/o2 for e2faca9 at 2026-03-30 16:15:

## sw/BUILD/O2Physics-latest/log
/sw/SOURCES/O2Physics/slc9_x86-64-slc9_x86-64/0/PWGLF/Tasks/Strangeness/sigmaanalysis.cxx:1492:3: error: control reaches end of non-void function [-Werror=return-type]
/sw/SOURCES/O2Physics/slc9_x86-64-slc9_x86-64/0/PWGLF/Tasks/Strangeness/sigmaanalysis.cxx:1492:3: error: control reaches end of non-void function [-Werror=return-type]
ninja: build stopped: subcommand failed.

Full log here.

[vkucera]

@gianniliveraro @romainschotter There are missing includes. Don't ignore them.