[PWGCF] Add event-by-event event classifier based on number of uncorrelated seeds

[EmilGorm]

No description provided.

[github-actions]

O2 linter results: ❌ 0 errors, ⚠️ 2 warnings, 🔕 1 disabled

[alibuild]

Error while checking build/O2Physics/code-check for c467858 at 2026-08-06 23:51:

## sw/BUILD/O2Physics-latest/log
2026-08-06T23:29:59.750+0200 [24:139826612013632] [buildboxcommon_grpcretrier.cpp:177] [ERROR] Retry limit (0) exceeded for "ActionCache.GetActionResult()", last gRPC error was [14: failed to connect to all addresses; last error: UNKNOWN: ipv4:127.0.0.1:8980: Failed to connect to remote host: Connection refused]
2026-08-06T23:29:59.750+0200 [24:139826612013632] [executioncontext.cpp:544] [ERROR] Error while querying action cache at "http://localhost:8980": 14: failed to connect to all addresses; last error: UNKNOWN: ipv4:127.0.0.1:8980: Failed to connect to remote host: Connection refused
2026-08-06T23:32:04.872+0200 [24:139826612013632] [buildboxcommon_grpcretrier.cpp:177] [ERROR] Retry limit (0) exceeded for "FindMissingBlobs()", last gRPC error was [14: failed to connect to all addresses; last error: UNKNOWN: ipv6:%5B::1%5D:8980: Failed to connect to remote host: Connection refused]
2026-08-06T23:29:59.817+0200 [23:140362843269696] [buildboxcommon_grpcretrier.cpp:177] [ERROR] Retry limit (0) exceeded for "ActionCache.GetActionResult()", last gRPC error was [14: failed to connect to all addresses; last error: UNKNOWN: ipv4:127.0.0.1:8980: Failed to connect to remote host: Connection refused]
2026-08-06T23:29:59.817+0200 [23:140362843269696] [executioncontext.cpp:544] [ERROR] Error while querying action cache at "http://localhost:8980": 14: failed to connect to all addresses; last error: UNKNOWN: ipv4:127.0.0.1:8980: Failed to connect to remote host: Connection refused
2026-08-06T23:33:33.823+0200 [23:140362843269696] [buildboxcommon_grpcretrier.cpp:177] [ERROR] Retry limit (0) exceeded for "FindMissingBlobs()", last gRPC error was [14: failed to connect to all addresses; last error: UNKNOWN: ipv6:%5B::1%5D:8980: Failed to connect to remote host: Connection refused]


## sw/BUILD/O2Physics-code-check-latest/log
--
========== List of issues found ==========
++ echo 'Found 14 errors and 0 warnings.'
Found 14 errors and 0 warnings.
++ [[ 14 -gt 0 ]]
++ cat /sw/BUILD/f516ece2f73a27ee1555f775da22699deec5caab/O2Physics-code-check/errors.txt
PWGCF/TwoParticleCorrelations/Tasks/twoParticleCorrelationsMpi.cxx:187:5: error: function 'isValid' should be marked [[nodiscard]] [modernize-use-nodiscard,-warnings-as-errors]
PWGCF/TwoParticleCorrelations/Tasks/twoParticleCorrelationsMpi.cxx:188:5: error: function 'nearYield' should be marked [[nodiscard]] [modernize-use-nodiscard,-warnings-as-errors]
PWGCF/TwoParticleCorrelations/Tasks/twoParticleCorrelationsMpi.cxx:189:5: error: function 'awayYield' should be marked [[nodiscard]] [modernize-use-nodiscard,-warnings-as-errors]
PWGCF/TwoParticleCorrelations/Tasks/twoParticleCorrelationsMpi.cxx:190:5: error: function 'nuncSeeds' should be marked [[nodiscard]] [modernize-use-nodiscard,-warnings-as-errors]
PWGCF/TwoParticleCorrelations/Tasks/twoParticleCorrelationsMpi.cxx:530:10: error: implicit conversion 'const TNamed *' -> 'bool' [readability-implicit-bool-conversion,-warnings-as-errors]
PWGCF/TwoParticleCorrelations/Tasks/twoParticleCorrelationsMpi.cxx:534:10: error: implicit conversion 'const TNamed *' -> 'bool' [readability-implicit-bool-conversion,-warnings-as-errors]
PWGCF/TwoParticleCorrelations/Tasks/twoParticleCorrelationsMpi.cxx:541:5: error: do not declare C-style arrays, use 'std::array' instead [modernize-avoid-c-arrays,-warnings-as-errors]
PWGCF/TwoParticleCorrelations/Tasks/twoParticleCorrelationsMpi.cxx:551:42: 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/TwoParticleCorrelations/Tasks/twoParticleCorrelationsMpi.cxx:556:10: error: no header providing "Long64_t" is directly included [misc-include-cleaner,-warnings-as-errors]
PWGCF/TwoParticleCorrelations/Tasks/twoParticleCorrelationsMpi.cxx:562:19: 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/TwoParticleCorrelations/Tasks/twoParticleCorrelationsMpi.cxx:571:47: error: no header providing "std::size_t" is directly included [misc-include-cleaner,-warnings-as-errors]
PWGCF/TwoParticleCorrelations/Tasks/twoParticleCorrelationsMpi.cxx:605:5: error: use auto when initializing with a cast to avoid duplicating the type name [modernize-use-auto,-warnings-as-errors]
PWGCF/TwoParticleCorrelations/Tasks/twoParticleCorrelationsMpi.cxx:606:48: error: no header providing "TObject" is directly included [misc-include-cleaner,-warnings-as-errors]
PWGCF/TwoParticleCorrelations/Tasks/twoParticleCorrelationsMpi.cxx:678:66: error: 'data' should be used for accessing the data pointer instead of taking the address of the 0-th element [readability-container-data-pointer,-warnings-as-errors]
++ [[ 0 -gt 0 ]]
++ [[ 14 -gt 0 ]]
++ exit 1
--

Full log here.