TPC: Add sector edge fluctuation correction infrastructure

[matthias-kleiner]

• New SectorEdgeFluctuations class parses a CSV table of run/time intervals and optional per-sector scaling factors stored in CCDB as CalSecEdgeInfo
• New CCDB correction map type CalSecEdgeCorrection holds per-sector delta distortion maps, applied based on the sectors and scaling factors from SectorEdgeFluctuations
• TPCFastSpaceChargeCorrectionHelper extended to support per-sector scaling factors
• Correction is added to TPCScalerSpec and enabled via --enable-sec-edge-fluc-correction
• Applied scaling factors are written to TimeSeriesITSTPC for visualisation in the TPC time series

[wiechula]

Perhaps the default should be on, so one could rename this to disable-...

[matthias-kleiner]

Thanks @wiechula for the comments. I just fixed them

[alibuild]

Error while checking build/O2/fullCI_slc9 for 335d1a3 at 2026-06-24 06:16:

## sw/BUILD/O2-full-system-test-latest/log
command /sw/slc9_x86-64/O2/slc9_x86-64-slc9_x86-64-local7/prodtests/full-system-test/dpl-workflow.sh had nonzero exit code 1
[9150:internal-dpl-ccdb-backend]: [02:54:41][ERROR] CcdbDownloader finished transfer http://alice-ccdb.cern.ch/TPC/Calib/SecEdgeFlucInfo for 1550600800023 (agent_id: o2-itsmft-stf-d/o2-itsmft-stf-decoder-workflow@9150 target/Linux_x86_64 init/1782262475739 id/mesosci@alimetal00.cern.ch session/KeUsotes) with http code: 404
[9150:internal-dpl-ccdb-backend]: [02:54:41][ERROR] File TPC/Calib/SecEdgeFlucInfo could not be retrieved. No more hosts to try.
[9150:internal-dpl-ccdb-backend]: [02:54:41][FATAL] Unable to find CCDB object TPC/Calib/SecEdgeFlucInfo/1550600800023
[9150:internal-dpl-ccdb-backend]: [02:54:41][ERROR] Exception while running: Fatal error. Rethrowing.
[9150:internal-dpl-ccdb-backend]: [02:54:41][FATAL] Unhandled o2::framework::runtime_error reached the top of main of o2-itsmft-stf-decoder-workflow, device shutting down. Reason: Fatal error
[ERROR] Workflow crashed - PID 9150 (internal-dpl-ccdb-backend) did not exit correctly however it's not clear why. Exit code forced to 128.
[ERROR]  - Device internal-dpl-ccdb-backend: pid 9150 (exit 128)
[INFO]    - First error: [02:54:41][FATAL] Unable to find CCDB object TPC/Calib/SecEdgeFlucInfo/1550600800023
[ERROR] SEVERE: Device internal-dpl-ccdb-backend (9150) had at least one message above severity 7: Unable to find CCDB object TPC/Calib/SecEdgeFlucInfo/1550600800023


## sw/BUILD/o2checkcode-latest/log
--
========== List of errors found ==========
++ GRERR=0
++ grep -v clang-diagnostic-error error-log.txt
++ grep ' error:'
grep: error-log.txt: binary file matches
++ GRERR=1
++ [[ 1 == 0 ]]
++ mkdir -p /sw/INSTALLROOT/f720b7854c7c35e92b5d3d01ceb4aedf59175d04/slc9_x86-64/o2checkcode/1.0-local115/etc/modulefiles
++ alibuild-generate-module
+ HAS_BIN=
+ HAS_LIB=
+ HAS_CMAKE=
+ HAS_ROOT=
+ '[' 0 '!=' 0 ']'
+ cat
+ printf 'if ![ is-loaded '\''BASE/1.0'\'' ] {\n module load BASE/1.0\n}'
+ echo 'BUILD_REQUIRES=CMake alibuild-recipe-tools defaults-release'
BUILD_REQUIRES=CMake alibuild-recipe-tools defaults-release
+ FULL_BUILD_REQUIRES='CMake defaults-release UUID date json-c Alice-GRID-Utils alibuild-recipe-tools ninja-fortran safe_int O2-customization googlebenchmark pytorch_cpuinfo FairCMakeModules bz2 Python-modules-list ninja double-conversion MPFR'
+ echo 'FULL_BUILD_REQUIRES=CMake defaults-release UUID date json-c Alice-GRID-Utils alibuild-recipe-tools ninja-fortran safe_int O2-customization googlebenchmark pytorch_cpuinfo FairCMakeModules bz2 Python-modules-list ninja double-conversion MPFR'
FULL_BUILD_REQUIRES=CMake defaults-release UUID date json-c Alice-GRID-Utils alibuild-recipe-tools ninja-fortran safe_int O2-customization googlebenchmark pytorch_cpuinfo FairCMakeModules bz2 Python-modules-list ninja double-conversion MPFR
++ env
++ cut -f1 -d=
++ grep -v '^DEFAULT_'
++ grep -v PKGREVISION
++ grep -v ALIBUILD_RECIPE_TOOLS
++ grep REVISION
++ sed -e s/_REVISION//
+ for x in $(env | cut -f1 -d= | grep -v "^DEFAULT_" | grep -v PKGREVISION | grep -v ALIBUILD_RECIPE_TOOLS | grep REVISION | sed -e 's/_REVISION//')
++ eval 'echo $LIBFFI_REVISION'
+++ echo 10
+ REVISION_VALUE=10
++ eval 'echo $LIBFFI_VERSION'
+++ echo v3.2.1-alice1
[0 more errors; see full log]

Full log here.

[shahor02]

I've uploaded the objects with the local build using #15532, for the full_CI should pick it.