Incorporate diffimDRP into the DRP step subsets

pipelines/imsim/DRP.yaml

@@ -70,12 +70,13 @@ subsets:
         - deblend
         - measure
         - mergeMeasurements
-        - forcedPhotCcd
         - forcedPhotCoadd
         - transformObjectTable
         - writeObjectTable
         - consolidateObjectTable
         - healSparsePropertyMaps
+        - selectGoodSeeingVisits
+        - templateGen
         description: >
             Tasks that can be run together, but only after the 'step1' and 'step2'
             subsets.
@@ -92,3 +93,42 @@ subsets:
 
             This subset is considered a workaround for missing middleware and task
             functionality.  It may be removed in the future.
+    step4:
+        subset:
+        - forcedPhotCcd
+        - forcedPhotDiffim
+        - imageDifference
+        - transformDiaSourceCat
+        description: >
+            Tasks that can be run together, but only after the 'step1', 'step2'
+            and 'step3' subsets
+
+            These detector-level tasks should not be run with
+            'tract' or 'patch' as part of the data ID expression if all
+            reference catalogs or diffIm templates that cover these
+            detector-level quanta are desired.
+    step5:
+        subset:
+        - consolidateDiaSourceTable
+        - drpAssociation
+        - drpDiaCalculation
+        description: >
+            Tasks that can be run together, but only after the 'step1', 'step2',
+            'step3', and 'step4' subsets
+
+            These DIA aggregation steps include both a visit-level aggregation
+            step consolidateDiaSourceTable and tract-level aggregation steps
+            drpAssociation and drpDiaCalculation.
+
+            While processing DC2 test-med-1, running without tract or patch in
+            the data query is recommended. If processing many contiguous tracts
+            running with tract in the dataId will be unavoidable.
+            If run with tract or patch in the data query, drpAssociation and
+            drpDiaCalculation will be complete, but the outputs of
+            consolidateDiaSourceTable will not contain complete visits.
+
+            This subset is separate from step4 to signal to operators to pause
+            to assess unexpected image differencing failures before these
+            aggregation steps. Otherwise, if run in the same quantum graph,
+            aggregated data products (e.g. diaObjects) would not be created if
+            one or more of the expected inputs is missing.