Pass parent dirty to EagerDirty#update

Author: mbouaziz

skiplang/prelude/src/skstore/Context.sk

@@ -717,7 +717,7 @@ mutable class Context private {
           };
           EagerDir::update(
             this,
-            this.dirty,
+            this.dirty.maybeGet(parentName),
             this.dirtyReaders.maybeGet(parentName),
             parentName,
             parentMaps,

skiplang/prelude/src/skstore/EagerDir.sk

@@ -1537,7 +1537,7 @@ class EagerDir protected {
 
   static fun update(
     context: mutable Context,
-    contextDirty: SortedMap<DirName, SortedSet<Key>>,
+    parentDirtyOpt: ?SortedSet<Key>,
     contextDirtyReadersOpt: ?SortedMap<DirName, SortedSet<Key>>,
     parentName: DirName,
     parentMaps: Array<
@@ -1574,7 +1574,7 @@ class EagerDir protected {
         })
       }
     };
-    contextDirty.maybeGet(parent.dirName) match {
+    parentDirtyOpt match {
     | None() -> void
     | Some(dirtyKeys) ->
       keys = dirtyKeys.values();