[PWGCF] jEPFlowAnalysis.cxx: add angular selection for two leading tracks

[jikim1290]

add angular selection for two leading tracks

[github-actions]

O2 linter results: ❌ 0 errors, ⚠️ 3 warnings, 🔕 0 disabled

[alibuild]

Error while checking build/O2Physics/code-check for 015a390 at 2026-08-03 07:39:

## sw/BUILD/O2Physics-code-check-latest/log
--
========== List of issues found ==========
++ echo 'Found 18 errors and 19 warnings.'
Found 18 errors and 19 warnings.
++ [[ 18 -gt 0 ]]
++ cat /sw/BUILD/caf10b2ee4253f1667181c86557292abdb1cbb26/O2Physics-code-check/errors.txt
PWGCF/JCorran/Tasks/jEPFlowAnalysis.cxx:75:8: error: constructor does not initialize these fields: pdg, ccdb [cppcoreguidelines-pro-type-member-init,-warnings-as-errors]
PWGCF/JCorran/Tasks/jEPFlowAnalysis.cxx:207:40: error: initializer for member 'shiftprofile' is redundant [readability-redundant-member-init,-warnings-as-errors]
PWGCF/JCorran/Tasks/jEPFlowAnalysis.cxx:218:37: error: initializer for member 'ft0RelGainConst' is redundant [readability-redundant-member-init,-warnings-as-errors]
PWGCF/JCorran/Tasks/jEPFlowAnalysis.cxx:219:37: error: initializer for member 'fv0RelGainConst' is redundant [readability-redundant-member-init,-warnings-as-errors]
PWGCF/JCorran/Tasks/jEPFlowAnalysis.cxx:235:7: error: do not use 'else' after 'return' [readability-else-after-return,-warnings-as-errors]
PWGCF/JCorran/Tasks/jEPFlowAnalysis.cxx:247:31: error: repeated branch body in conditional chain [bugprone-branch-clone,-warnings-as-errors]
PWGCF/JCorran/Tasks/jEPFlowAnalysis.cxx:249:7: error: do not use 'else' after 'return' [readability-else-after-return,-warnings-as-errors]
PWGCF/JCorran/Tasks/jEPFlowAnalysis.cxx:271:5: error: switching on non-enum value without default case may not cover all cases [bugprone-switch-missing-default-case,-warnings-as-errors]
PWGCF/JCorran/Tasks/jEPFlowAnalysis.cxx:374:5: error: do not declare C-style arrays, use 'std::array' instead [modernize-avoid-c-arrays,-warnings-as-errors]
PWGCF/JCorran/Tasks/jEPFlowAnalysis.cxx:375:5: error: do not declare C-style arrays, use 'std::array' instead [modernize-avoid-c-arrays,-warnings-as-errors]
PWGCF/JCorran/Tasks/jEPFlowAnalysis.cxx:376:5: error: do not declare C-style arrays, use 'std::array' instead [modernize-avoid-c-arrays,-warnings-as-errors]
PWGCF/JCorran/Tasks/jEPFlowAnalysis.cxx:574:5: error: do not declare C-style arrays, use 'std::array' instead [modernize-avoid-c-arrays,-warnings-as-errors]
PWGCF/JCorran/Tasks/jEPFlowAnalysis.cxx:580:31: error: do not implicitly decay an array into a pointer; consider using gsl::array_view or an explicit cast instead [cppcoreguidelines-pro-bounds-array-to-pointer-decay,-warnings-as-errors]
PWGCF/JCorran/Tasks/jEPFlowAnalysis.cxx:655:9: error: implicit conversion 'int' -> 'bool' [readability-implicit-bool-conversion,-warnings-as-errors]
PWGCF/JCorran/Tasks/jEPFlowAnalysis.cxx:666:9: error: implicit conversion 'int' -> 'bool' [readability-implicit-bool-conversion,-warnings-as-errors]
PWGCF/JCorran/Tasks/jEPFlowAnalysis.cxx:774:9: error: implicit conversion 'int' -> 'bool' [readability-implicit-bool-conversion,-warnings-as-errors]
PWGCF/JCorran/Tasks/jEPFlowAnalysis.cxx:779:9: error: implicit conversion 'int' -> 'bool' [readability-implicit-bool-conversion,-warnings-as-errors]
PWGCF/JCorran/Tasks/jEPFlowAnalysis.cxx:815:11: error: implicit conversion 'uint8_t' (aka 'unsigned char') -> 'bool' [readability-implicit-bool-conversion,-warnings-as-errors]
++ [[ 19 -gt 0 ]]
++ cat /sw/BUILD/caf10b2ee4253f1667181c86557292abdb1cbb26/O2Physics-code-check/warnings.txt
PWGCF/JCorran/Tasks/jEPFlowAnalysis.cxx:269:44: warning: statement should be inside braces [readability-braces-around-statements]
PWGCF/JCorran/Tasks/jEPFlowAnalysis.cxx:273:26: warning: statement should be inside braces [readability-braces-around-statements]
PWGCF/JCorran/Tasks/jEPFlowAnalysis.cxx:277:136: warning: statement should be inside braces [readability-braces-around-statements]
PWGCF/JCorran/Tasks/jEPFlowAnalysis.cxx:282:120: warning: statement should be inside braces [readability-braces-around-statements]
PWGCF/JCorran/Tasks/jEPFlowAnalysis.cxx:286:81: warning: statement should be inside braces [readability-braces-around-statements]
PWGCF/JCorran/Tasks/jEPFlowAnalysis.cxx:291:114: warning: statement should be inside braces [readability-braces-around-statements]
PWGCF/JCorran/Tasks/jEPFlowAnalysis.cxx:294:59: warning: statement should be inside braces [readability-braces-around-statements]
PWGCF/JCorran/Tasks/jEPFlowAnalysis.cxx:445:48: warning: statement should be inside braces [readability-braces-around-statements]
PWGCF/JCorran/Tasks/jEPFlowAnalysis.cxx:462:41: warning: statement should be inside braces [readability-braces-around-statements]
PWGCF/JCorran/Tasks/jEPFlowAnalysis.cxx:467:50: warning: statement should be inside braces [readability-braces-around-statements]
PWGCF/JCorran/Tasks/jEPFlowAnalysis.cxx:470:116: warning: statement should be inside braces [readability-braces-around-statements]
PWGCF/JCorran/Tasks/jEPFlowAnalysis.cxx:473:66: warning: statement should be inside braces [readability-braces-around-statements]
PWGCF/JCorran/Tasks/jEPFlowAnalysis.cxx:529:46: warning: statement should be inside braces [readability-braces-around-statements]
PWGCF/JCorran/Tasks/jEPFlowAnalysis.cxx:682:27: warning: statement should be inside braces [readability-braces-around-statements]
PWGCF/JCorran/Tasks/jEPFlowAnalysis.cxx:765:122: warning: statement should be inside braces [readability-braces-around-statements]
PWGCF/JCorran/Tasks/jEPFlowAnalysis.cxx:795:27: warning: statement should be inside braces [readability-braces-around-statements]
PWGCF/JCorran/Tasks/jEPFlowAnalysis.cxx:830:33: warning: statement should be inside braces [readability-braces-around-statements]
PWGCF/JCorran/Tasks/jEPFlowAnalysis.cxx:843:63: warning: statement should be inside braces [readability-braces-around-statements]
PWGCF/JCorran/Tasks/jEPFlowAnalysis.cxx:853:43: warning: statement should be inside braces [readability-braces-around-statements]
++ [[ 18 -gt 0 ]]
++ exit 1
--
[0 more errors; see full log]

Full log here.