TPC VDrift: make VDriftHelper usable outside DPL (e.g. O2Physics)

[matthias-kleiner]

Split VDriftHelper::extractCCDBInputs into the CCDB-fetching part and a framework-independent updateVDrift() and add BasicCCDBManager-based overloads to VDriftHelper/PressureTemperatureHelper so O2Physics can call these directly instead of reimplementing the T/P-scaling logic (see AliceO2Group/O2Physics#17656). Calling these every event is cheap: laser/TGL/pressure/temperature are only re-accounted when the underlying CCDB object actually changed and logging is throttled to avoid stdout spam in trains.

[shahor02]

Thanks @matthias-kleiner !

@f3sch with this you just need to create a VDriftHelper instance and simply do

mVDHelper.extractCCDBInputs(*mCCDB, timestamp);
return mVDHelper.getVDriftObject().getVDrift();

either directly from the analysis task of from your TPCVDriftManager.

[mhemmer-cern]

The timestamps in O2Physics that we get from the table are unsigned long (uint64_t). Might be good to change this so there isn't a problem where some values go to overflow of signed longs and switch sign.

[shahor02]

The type used by the CCDB API is anyway long (signed), there is no point in correcting intermediate types.
But we will not have an overflow till February 2106.

[mhemmer-cern]

Oh okay, then it's a bit weird, that the timestamp table return unsigned long, but okay.

[alibuild]

Error while checking build/O2/fullCI_slc9 for 489d19f at 2026-09-02 14:29:

## sw/BUILD/O2Physics-latest/log
c++: fatal error: Killed signal terminated program cc1plus
ninja: build stopped: subcommand failed.


## 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/3c43d855ae27ce0a69b509b6822803a71f271c72/slc9_x86-64/o2checkcode/1.0-local94/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='defaults-release bz2 pytorch_cpuinfo Python-modules-list UUID safe_int Alice-GRID-Utils json-c date MPFR CMake O2-customization googlebenchmark FairCMakeModules double-conversion alibuild-recipe-tools ninja-fortran ninja'
+ echo 'FULL_BUILD_REQUIRES=defaults-release bz2 pytorch_cpuinfo Python-modules-list UUID safe_int Alice-GRID-Utils json-c date MPFR CMake O2-customization googlebenchmark FairCMakeModules double-conversion alibuild-recipe-tools ninja-fortran ninja'
FULL_BUILD_REQUIRES=defaults-release bz2 pytorch_cpuinfo Python-modules-list UUID safe_int Alice-GRID-Utils json-c date MPFR CMake O2-customization googlebenchmark FairCMakeModules double-conversion alibuild-recipe-tools ninja-fortran ninja
++ 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 14
+ REVISION_VALUE=14
++ eval 'echo $LIBFFI_VERSION'
+++ echo v3.2.1-alice1
+ VERSION_VALUE=v3.2.1-alice1
++ eval 'echo $LIBFFI_ROOT'
+++ echo /sw/slc9_x86-64/libffi/v3.2.1-alice1-14
+ ROOT_PATH_VALUE=/sw/slc9_x86-64/libffi/v3.2.1-alice1-14
+ '[' -z 14 ']'
+ echo 'defaults-release bz2 pytorch_cpuinfo Python-modules-list UUID safe_int Alice-GRID-Utils json-c date MPFR CMake O2-customization googlebenchmark FairCMakeModules double-conversion alibuild-recipe-tools ninja-fortran ninja'
+ tr '[:lower:]' '[:upper:]'
+ tr - _
[0 more errors; see full log]

Full log here.