[PWGEM,Photon] move remaining CCDB fetches to CCDB columns

Replace per-task BasicCCDBManager queries with declarative CCDB columns,
and drop CCDB-manager leftovers from tasks that already read columns.

Migrations:
- calibTaskEmc: BadChannelMap from aod::EmEmcalObjects
- pairQcTask, dalitzEEQC, dalitzEEQCMC: GRPMagField from aod::EmMagFields;
  drop the GRPObject path, skipGRPOquery, grpPath, grpmagPath, ccdb-url
- CheckMCV0: GRPMagField + MatLUT from aod::PcmObjects and the shared
  aod::GeomCCDBObjects; the LUT pointer is set for every collision, the
  magnetic field is still installed once per run
- photonhbt: GRPMagField from aod::EmMagFields, TPC VDrift from a new
  aod::EmTpcObjects table (EventTables.h, reusing ccdbTpc::VDriftTgl)

Cleanup (no behaviour change): remove the unused CCDB manager, its setup
and the now-unused ccdb-url/skipGRPOquery/grpmagPath options from
Pi0EtaToGammaGamma(MC).h, TaggingPi0(MC).h, pcmQC, photonResoTask,
prefilterPhoton and skimmerPrimaryElectronFromDalitzEE (the skimmer keeps
the manager for the TOF response). ccdb-url is kept where it feeds the
V0 ML models.

Behaviour changes in photonhbt:
- VDrift is now taken at each event's timestamp instead of mid-run
  (getForRun), so it follows changes within a run
- a missing VDrift object is now fatal instead of a warning

Not migrated: SP resolution (taskPhotonFlow, taskPi0FlowEMC) and
nonLinProducer (optional objects from user paths set per wagon),
photonconversionbuilder (LUT/geometry loaded once in init), Legacy/.

Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com>

Also add asymmetric-energy-cut to `taskPi0FlowEMC .cxx` for EMCal EMCal cluster pairings.

Author: mhemmer-cern

PWGEM/PhotonMeson/Core/Pi0EtaToGammaGamma.h

@@ -36,7 +36,6 @@
 #include "Common/DataModel/Centrality.h"
 #include "Common/DataModel/EventSelection.h"
 
-#include <CCDB/BasicCCDBManager.h>
 #include <CCDB/CcdbApi.h>
 #include <CommonConstants/MathConstants.h>
 #include <CommonConstants/PhysicsConstants.h>
@@ -296,7 +295,6 @@ struct Pi0EtaToGammaGamma {
   std::vector<float> occ_bin_edges;
 
   o2::ccdb::CcdbApi ccdbApi;
-  o2::framework::Service<o2::ccdb::BasicCCDBManager> ccdb{};
   int mRunNumber = -1;
   float d_bz = 0;
   o2::emcal::Geometry* emcalGeom = nullptr;
@@ -445,11 +443,6 @@ struct Pi0EtaToGammaGamma {
 
     mRunNumber = 0;
     d_bz = 0;
-
-    ccdb->setURL(ccdburl);
-    ccdb->setCaching(true);
-    ccdb->setLocalObjectValidityChecking();
-    ccdb->setFatalWhenNull(false);
   }
 
   template <o2::soa::is_iterator TCollision>

PWGEM/PhotonMeson/Core/Pi0EtaToGammaGammaMC.h

@@ -36,7 +36,6 @@
 #include "Common/DataModel/Centrality.h"
 #include "Common/DataModel/EventSelection.h"
 
-#include <CCDB/BasicCCDBManager.h>
 #include <CCDB/CcdbApi.h>
 #include <CommonConstants/PhysicsConstants.h>
 #include <DataFormatsParameters/GRPMagField.h>
@@ -268,7 +267,6 @@ struct Pi0EtaToGammaGammaMC {
   static constexpr std::array<std::string_view, 2> kParnames = {"Pi0/", "Eta/"};
 
   o2::ccdb::CcdbApi ccdbApi;
-  o2::framework::Service<o2::ccdb::BasicCCDBManager> ccdb{};
   int mRunNumber = 0;
   float d_bz = 0;
 
@@ -300,11 +298,6 @@ struct Pi0EtaToGammaGammaMC {
 
     mRunNumber = 0;
     d_bz = 0;
-
-    ccdb->setURL(ccdburl);
-    ccdb->setCaching(true);
-    ccdb->setLocalObjectValidityChecking();
-    ccdb->setFatalWhenNull(false);
   }
 
   template <o2::soa::is_iterator TCollision>

PWGEM/PhotonMeson/Core/TaggingPi0.h

@@ -32,7 +32,6 @@
 #include "Common/DataModel/EventSelection.h"
 #include "Common/DataModel/PIDResponseTPC.h"
 
-#include <CCDB/BasicCCDBManager.h>
 #include <CCDB/CcdbApi.h>
 #include <CommonConstants/MathConstants.h>
 #include <CommonConstants/PhysicsConstants.h>
@@ -87,7 +86,6 @@ using MyEMCCluster = MyEMCClusters::iterator;
 
 template <o2::aod::pwgem::photonmeson::photonpair::PairType pairtype, typename... Types>
 struct TaggingPi0 {
-  o2::framework::Configurable<std::string> ccdburl{"ccdb-url", "http://alice-ccdb.cern.ch", "url of the ccdb repository"};
   o2::framework::Configurable<float> d_bz_input{"d_bz_input", -999, "bz field in kG, -999 is automatic"};
   o2::framework::Configurable<uint64_t> ndiff_bc_mix{"ndiff_bc_mix", 594, "difference in global BC required in mixed events"};
 
@@ -222,7 +220,6 @@ struct TaggingPi0 {
   std::vector<float> occ_bin_edges;
 
   o2::ccdb::CcdbApi ccdbApi;
-  o2::framework::Service<o2::ccdb::BasicCCDBManager> ccdb{};
   int mRunNumber = 0;
   float d_bz = 0;
 
@@ -255,11 +252,6 @@ struct TaggingPi0 {
 
     mRunNumber = 0;
     d_bz = 0;
-
-    ccdb->setURL(ccdburl);
-    ccdb->setCaching(true);
-    ccdb->setLocalObjectValidityChecking();
-    ccdb->setFatalWhenNull(false);
   }
 
   template <o2::soa::is_iterator TCollision>

PWGEM/PhotonMeson/Core/TaggingPi0MC.h

@@ -33,7 +33,6 @@
 #include "Common/DataModel/EventSelection.h"
 #include "Common/DataModel/PIDResponseTPC.h"
 
-#include <CCDB/BasicCCDBManager.h>
 #include <CCDB/CcdbApi.h>
 #include <CommonConstants/MathConstants.h>
 #include <CommonConstants/PhysicsConstants.h>
@@ -91,7 +90,6 @@ using MyMCElectron = MyMCElectrons::iterator;
 
 template <o2::aod::pwgem::photonmeson::photonpair::PairType pairtype, typename... Types>
 struct TaggingPi0MC {
-  o2::framework::Configurable<std::string> ccdburl{"ccdb-url", "http://alice-ccdb.cern.ch", "url of the ccdb repository"};
   o2::framework::Configurable<float> d_bz_input{"d_bz_input", -999, "bz field in kG, -999 is automatic"};
 
   o2::framework::Configurable<int> cfgQvecEstimator{"cfgQvecEstimator", 0, "FT0M:0, FT0A:1, FT0C:2"};
@@ -214,7 +212,6 @@ struct TaggingPi0MC {
   static constexpr std::array<std::string_view, 2> parnames = {"Pi0/", "Eta/"};
 
   o2::ccdb::CcdbApi ccdbApi;
-  o2::framework::Service<o2::ccdb::BasicCCDBManager> ccdb{};
   int mRunNumber = 0;
   float d_bz = 0;
   TF1* f1fd_k0s_to_pi0 = nullptr;
@@ -232,11 +229,6 @@ struct TaggingPi0MC {
     mRunNumber = 0;
     d_bz = 0;
     f1fd_k0s_to_pi0 = new TF1("f1fd_k0s_to_pi0", TString(fd_k0s_to_pi0), 0.f, 100.f);
-
-    ccdb->setURL(ccdburl);
-    ccdb->setCaching(true);
-    ccdb->setLocalObjectValidityChecking();
-    ccdb->setFatalWhenNull(false);
   }
 
   template <o2::soa::is_iterator TCollision>

PWGEM/PhotonMeson/DataModel/EventTables.h

@@ -18,6 +18,7 @@
 
 #include "Common/CCDB/EventSelectionParams.h"
 #include "Common/DataModel/EventSelection.h"
+#include "Common/DataModel/TpcCCDBObjects.h"
 
 #include <DataFormatsParameters/GRPMagField.h>
 #include <EMCALCalib/BadChannelMap.h>
@@ -118,6 +119,11 @@ DECLARE_SOA_CCDB_COLUMN(BadChannelMap, badChannelMap, o2::emcal::BadChannelMap,
 DECLARE_SOA_TIMESTAMPED_TABLE(EmEmcalObjects, aod::PMEvents, o2::aod::timestamp::Timestamp, 0, "EMEMCALOBJECTS", //!
                               em::ccdbEmcal::BadChannelMap);
 
+/// TPC drift velocity for EmEvents. Reuses the shared column (same label and path).
+/// Timestamp-uniform since the drift velocity changes within a run.
+DECLARE_SOA_TIMESTAMPED_TABLE(EmTpcObjects, aod::PMEvents, o2::aod::timestamp::Timestamp, 0, "EMTPCOBJECTS", //!
+                              ccdbTpc::VDriftTgl);
+
 } // namespace o2::aod
 
 #endif // PWGEM_PHOTONMESON_DATAMODEL_EVENTTABLES_H_