[PWGCF] book 2p correlation profile with eta gap

[pykuan]

• book 2p correlation profile with eta gap
• change cuts of centrality correlation

[github-actions]

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

[alibuild]

Error while checking build/O2Physics/code-check for 1d52947 at 2026-09-04 09:33:

modernize-use-default-member-init
    modernize-use-designated-initializers
    modernize-use-equals-default
    modernize-use-equals-delete
    modernize-use-nodiscard
    modernize-use-nullptr
    modernize-use-override
    modernize-use-starts-ends-with
    performance-for-range-copy
    performance-implicit-conversion-in-loop
    performance-inefficient-algorithm
    performance-inefficient-string-concatenation
    performance-inefficient-vector-operation
    performance-move-const-arg
    performance-no-automatic-move
    performance-trivially-destructible
    performance-type-promotion-in-math-fn
    performance-unnecessary-copy-initialization
    performance-unnecessary-value-param
    readability-avoid-unconditional-preprocessor-if
    readability-braces-around-statements
    readability-const-return-type
    readability-container-contains
    readability-container-data-pointer
    readability-container-size-empty
    readability-delete-null-pointer
    readability-duplicate-include
    readability-else-after-return
    readability-enum-initial-value
    readability-implicit-bool-conversion
    readability-inconsistent-declaration-parameter-name
    readability-misplaced-array-index
    readability-non-const-parameter
    readability-redundant-access-specifiers
    readability-redundant-casting
    readability-redundant-control-flow
    readability-redundant-declaration
    readability-redundant-member-init
    readability-redundant-preprocessor
    readability-redundant-string-cstr
    readability-redundant-string-init
    readability-reference-to-constructed-temporary
    readability-simplify-boolean-expr
    readability-static-definition-in-anonymous-namespace
    readability-string-compare
    readability-suspicious-call-argument

++ printf '%s\n' PWGCF/MultiparticleCorrelations/Tasks/multiparticleCumulants.cxx
++ xargs -r -P 24 '-I{}' /sw/slc9_x86-64/Clang/v20.1.7-26/bin-safe/clang-tidy -p /sw/BUILD/9dcd48c9538a9b08bde5d6330f298cb180f75116/O2Physics --checks= '{}'
++ tee /sw/BUILD/9dac415b629029b74c2e3644b5d534514017ab55/O2Physics-code-check/error-log.txt

Full log here.