Fix PWGHF struct member order: move ConfigurableAxis after Partition

According to PWGHF coding guidelines, ConfigurableAxis must appear AFTER
Partition declarations. The correct order is:

1. Configurable
2. Other members (HfHelper, HfEventSelection, ctpRateFetcher, SliceCache)
3. Service<>
4. using declarations
5. Filter, Preslice, PresliceUnsorted
6. Partition
7. ConfigurableAxis
8. HistogramRegistry

Changes:
- taskD0.cxx: Moved all ConfigurableAxis declarations to after Partition declarations
- taskDplus.cxx: Moved all ConfigurableAxis declarations to after Partition declarations

This resolves the linting errors:
- "ConfigurableAxis appears too early (before end of Partition<)"

Reference: https://aliceo2group.github.io/analysis-framework/docs/advanced-specifics/pwghf.html#contribute

🤖 Generated with [Claude Code](https://claude.com/claude-code)

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

Author: minjungkim12

PWGHF/D2H/Tasks/taskDplus.cxx

@@ -84,6 +84,11 @@ struct HfTaskDplus {
   Configurable<std::string> ccdbPathGrp{"ccdbPathGrp", "GLO/GRP/GRP", "Path of the grp file (Run 2)"};
   Configurable<std::string> ccdbPathGrpMag{"ccdbPathGrpMag", "GLO/Config/GRPMagField", "CCDB path of the GRPMagField object (Run 3)"};
 
+  // UPC gap determination thresholds
+  Configurable<float> upcFT0AThreshold{"upcFT0AThreshold", hf_upc::defaults::FT0AThreshold, "FT0-A amplitude threshold for UPC gap determination (a.u.)"};
+  Configurable<float> upcFT0CThreshold{"upcFT0CThreshold", hf_upc::defaults::FT0CThreshold, "FT0-C amplitude threshold for UPC gap determination (a.u.)"};
+  Configurable<float> upcZDCThreshold{"upcZDCThreshold", hf_upc::defaults::ZDCThreshold, "ZDC energy threshold for UPC gap determination (a.u.)"};
+
   HfEventSelection hfEvSel; // event selection and monitoring
 
   Service<o2::ccdb::BasicCCDBManager> ccdb;
@@ -128,11 +133,6 @@ struct HfTaskDplus {
   ConfigurableAxis thnConfigAxisFT0A{"thnConfigAxisFT0A", {1001, -1.5, 999.5}, "axis for FT0-A amplitude (a.u.)"};
   ConfigurableAxis thnConfigAxisFT0C{"thnConfigAxisFT0C", {1001, -1.5, 999.5}, "axis for FT0-C amplitude (a.u.)"};
 
-  // UPC gap determination thresholds
-  Configurable<float> upcFT0AThreshold{"upcFT0AThreshold", hf_upc::defaults::FT0AThreshold, "FT0-A amplitude threshold for UPC gap determination (a.u.)"};
-  Configurable<float> upcFT0CThreshold{"upcFT0CThreshold", hf_upc::defaults::FT0CThreshold, "FT0-C amplitude threshold for UPC gap determination (a.u.)"};
-  Configurable<float> upcZDCThreshold{"upcZDCThreshold", hf_upc::defaults::ZDCThreshold, "ZDC energy threshold for UPC gap determination (a.u.)"};
-
   HistogramRegistry registry{
     "registry",
     {{"hPt", "3-prong candidates;candidate #it{p}_{T} (GeV/#it{c});entries", {HistType::kTH1F, {{360, 0., 36.}}}},