[PWGLF] Optimisation and linter fixes for spectraTOF

[tonmoySh]

• Replaced hard-coded PDG codes with named constants from PhysicsConstant.h
• Replaced the "magic numbers" in the expressions constexpr values
• updated the variable and function names to follow standard naming convention (lowerCamelCase)
• updated the configurable names to follow standard naming convention (lowerCamelCase)
• updated the macro names to follow standard naming convention (SCREAMING_SNAKE_CASE)
• Changed the struct name "tofSpectra" to "SpectraTOF" to follow standard naming convention (UpperCamelCase) as well as to match with the Workflow file name (spectraTOF.cxx)
• other minor optimisations

[alibuild]

Error while checking build/O2Physics/o2 for 8bba576 at 2026-02-13 02:18:

## sw/BUILD/O2Physics-latest/log
/sw/SOURCES/O2Physics/14947-slc9_x86-64/0/PWGLF/Tasks/Nuspex/spectraTOF.cxx:83:48: error: 'doprocessFullEl' was not declared in this scope
/sw/SOURCES/O2Physics/14947-slc9_x86-64/0/PWGLF/Tasks/Nuspex/spectraTOF.cxx:83:65: error: 'doprocessFullMu' was not declared in this scope
/sw/SOURCES/O2Physics/14947-slc9_x86-64/0/PWGLF/Tasks/Nuspex/spectraTOF.cxx:83:82: error: 'doprocessFullPi' was not declared in this scope; did you mean 'doprocessFullParticle'?
/sw/SOURCES/O2Physics/14947-slc9_x86-64/0/PWGLF/Tasks/Nuspex/spectraTOF.cxx:83:99: error: 'doprocessFullKa' was not declared in this scope; did you mean 'doprocessFullParticle'?
/sw/SOURCES/O2Physics/14947-slc9_x86-64/0/PWGLF/Tasks/Nuspex/spectraTOF.cxx:83:116: error: 'doprocessFullPr' was not declared in this scope; did you mean 'doprocessFullParticle'?
/sw/SOURCES/O2Physics/14947-slc9_x86-64/0/PWGLF/Tasks/Nuspex/spectraTOF.cxx:83:133: error: 'doprocessFullDe' was not declared in this scope; did you mean 'doprocessFullParticle'?
/sw/SOURCES/O2Physics/14947-slc9_x86-64/0/PWGLF/Tasks/Nuspex/spectraTOF.cxx:83:150: error: 'doprocessFullTr' was not declared in this scope; did you mean 'doprocessFullParticle'?
/sw/SOURCES/O2Physics/14947-slc9_x86-64/0/PWGLF/Tasks/Nuspex/spectraTOF.cxx:83:167: error: 'doprocessFullHe' was not declared in this scope; did you mean 'doprocessFullParticle'?
/sw/SOURCES/O2Physics/14947-slc9_x86-64/0/PWGLF/Tasks/Nuspex/spectraTOF.cxx:83:184: error: 'doprocessFullAl' was not declared in this scope; did you mean 'doprocessFullParticle'?
/sw/SOURCES/O2Physics/14947-slc9_x86-64/0/PWGLF/Tasks/Nuspex/spectraTOF.cxx:85:50: error: 'doprocessLfFullEl' was not declared in this scope; did you mean 'doprocessLfFullParticle'?
/sw/SOURCES/O2Physics/14947-slc9_x86-64/0/PWGLF/Tasks/Nuspex/spectraTOF.cxx:85:69: error: 'doprocessLfFullMu' was not declared in this scope; did you mean 'doprocessLfFullParticle'?
/sw/SOURCES/O2Physics/14947-slc9_x86-64/0/PWGLF/Tasks/Nuspex/spectraTOF.cxx:85:88: error: 'doprocessLfFullPi' was not declared in this scope; did you mean 'doprocessLfFullParticle'?
/sw/SOURCES/O2Physics/14947-slc9_x86-64/0/PWGLF/Tasks/Nuspex/spectraTOF.cxx:85:107: error: 'doprocessLfFullKa' was not declared in this scope; did you mean 'doprocessLfFullParticle'?
/sw/SOURCES/O2Physics/14947-slc9_x86-64/0/PWGLF/Tasks/Nuspex/spectraTOF.cxx:85:126: error: 'doprocessLfFullPr' was not declared in this scope; did you mean 'doprocessLfFullParticle'?
/sw/SOURCES/O2Physics/14947-slc9_x86-64/0/PWGLF/Tasks/Nuspex/spectraTOF.cxx:85:145: error: 'doprocessLfFullDe' was not declared in this scope; did you mean 'doprocessLfFullParticle'?
/sw/SOURCES/O2Physics/14947-slc9_x86-64/0/PWGLF/Tasks/Nuspex/spectraTOF.cxx:85:164: error: 'doprocessLfFullTr' was not declared in this scope; did you mean 'doprocessLfFullParticle'?
/sw/SOURCES/O2Physics/14947-slc9_x86-64/0/PWGLF/Tasks/Nuspex/spectraTOF.cxx:85:183: error: 'doprocessLfFullHe' was not declared in this scope; did you mean 'doprocessLfFullParticle'?
/sw/SOURCES/O2Physics/14947-slc9_x86-64/0/PWGLF/Tasks/Nuspex/spectraTOF.cxx:85:202: error: 'doprocessLfFullAl' was not declared in this scope; did you mean 'doprocessLfFullParticle'?
/sw/SOURCES/O2Physics/14947-slc9_x86-64/0/PWGLF/Tasks/Nuspex/spectraTOF.cxx:306:5: error: two or more data types in declaration of 'h'
/sw/SOURCES/O2Physics/14947-slc9_x86-64/0/PWGLF/Tasks/Nuspex/spectraTOF.cxx:323:5: error: 'h' was not declared in this scope
/sw/SOURCES/O2Physics/14947-slc9_x86-64/0/PWGLF/Tasks/Nuspex/spectraTOF.cxx:1930:98: error: 'DcaMaxCombinedSigma' was not declared in this scope
/sw/SOURCES/O2Physics/14947-slc9_x86-64/0/PWGLF/Tasks/Nuspex/spectraTOF.cxx:1931:25: error: 'DcaTrkPtCut' was not declared in this scope
/sw/SOURCES/O2Physics/14947-slc9_x86-64/0/PWGLF/Tasks/Nuspex/spectraTOF.cxx:1932:42: error: 'DcaMaxTPCSigma' was not declared in this scope
/sw/SOURCES/O2Physics/14947-slc9_x86-64/0/PWGLF/Tasks/Nuspex/spectraTOF.cxx:1992:38: error: 'kD0' was not declared in this scope; did you mean 'o2::constants::physics::kD0'?
/sw/SOURCES/O2Physics/14947-slc9_x86-64/0/PWGLF/Tasks/Nuspex/spectraTOF.cxx:2722:37: error: 'cfgCutEtaMax' was not declared in this scope
ninja: build stopped: subcommand failed.

Full log here.