DPL: fixes for memory leak in CCDB object caching

[ehellbar]

No description provided.

[ktf]

This seems to be a common pattern. Maybe worth a small helper?

[ehellbar]

maybe I can put the pruning inside the adoptContainer as you suggested in you former comment? this if (oldDPLCacheIt is anyway not really needed because the pruning is a no-op?

[ehellbar]

I put a static helper to CCDBHelper.h

[ehellbar]

I cleaned up the excessive comments as well

[alibuild]

Error while checking build/O2/fullCI_slc9 for 35ea930 at 2026-06-10 21:02:

## sw/BUILD/O2Physics-latest/log
CMake Error at /sw/slc9_x86-64/CMake/v4.1.4-2/share/cmake-4.1/Modules/CMakeTestCCompiler.cmake:67 (message):
    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:'
++ GRERR=1
++ [[ 1 == 0 ]]
++ mkdir -p /sw/INSTALLROOT/3dab93be5dea1cd7df879ab0473e6189d6590e52/slc9_x86-64/o2checkcode/1.0-local2/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='pytorch_cpuinfo alibuild-recipe-tools double-conversion Python-modules-list O2-customization defaults-release date bz2 FairCMakeModules Alice-GRID-Utils CMake ninja-fortran safe_int ninja googlebenchmark UUID json-c MPFR'
+ echo 'FULL_BUILD_REQUIRES=pytorch_cpuinfo alibuild-recipe-tools double-conversion Python-modules-list O2-customization defaults-release date bz2 FairCMakeModules Alice-GRID-Utils CMake ninja-fortran safe_int ninja googlebenchmark UUID json-c MPFR'
FULL_BUILD_REQUIRES=pytorch_cpuinfo alibuild-recipe-tools double-conversion Python-modules-list O2-customization defaults-release date bz2 FairCMakeModules Alice-GRID-Utils CMake ninja-fortran safe_int ninja googlebenchmark UUID json-c 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
+ VERSION_VALUE=v3.2.1-alice1
++ eval 'echo $LIBFFI_ROOT'
+++ echo /sw/slc9_x86-64/libffi/v3.2.1-alice1-10
+ ROOT_PATH_VALUE=/sw/slc9_x86-64/libffi/v3.2.1-alice1-10
+ '[' -z 10 ']'
+ echo 'pytorch_cpuinfo alibuild-recipe-tools double-conversion Python-modules-list O2-customization defaults-release date bz2 FairCMakeModules Alice-GRID-Utils CMake ninja-fortran safe_int ninja googlebenchmark UUID json-c MPFR'
+ tr '[:lower:]' '[:upper:]'
+ tr - _
+ tr ' ' '\n'
[0 more errors; see full log]

Full log here.