#13273 Well Event: Support completion number on perforation events for COMPLUMP

Add a completion_number parameter to the add_perf_event Python API
(AddPerfEvent scriptable method) and a matching field on
RimWellEventPerf. When a timeline perforation event is materialised into
a RimPerforationInterval, a non-zero completion number is copied across,
so it flows through the existing completion-data path onto
RigCompletionData.

The schedule generator now emits COMPLUMP alongside COMPDAT: COMPDAT
generation is folded into generateCompletionsForWell, which computes the
completion data once and builds both keywords from it via the existing
RimKeywordFactory::complumpKeyword (added in #13273). COMPLUMP only
produces records for perforations that have a completion number and is
merged across wells like COMPDAT.

ApplicationLibCode/ProjectDataModelCommands/RimcWellEventTimeline.h

@@ -57,6 +57,7 @@ private:
     caf::PdmField<double>                                m_diameter;
     caf::PdmField<double>                                m_skinFactor;
     caf::PdmField<caf::AppEnum<RimWellEventPerf::State>> m_state;
+    caf::PdmField<int>                                   m_completionNumber;
 };
 
 //==================================================================================================