App.__read_dep_graph(): Remove redundant loop

__read_dep_graph() iterates over the given sections (flavours), but
the loop body does not use the loop variable: it passes the entire
sections list to get_project_refs() on every iteration, so the same
lookup is repeated for each section, and the recursion into the
found dependencies is re-triggered (and skipped) for each of them.

Remove the loop and do the lookup once per project.

Assisted-by: unsloth/Qwen3.8-27B-GGUF:Q4_K_M with pi.dev v0.84.2
Signed-off-by: Jan Lindemann <jan@janware.com>

src/python/jw/pkg/App.py

@@ -231,18 +231,17 @@ class App(Base):
         for project in projects:
             if project in graph:
                 continue
-            for section in sections:
-                deps = self.get_project_refs(
-                    [project],
-                    ['pkg.requires.jw'],
-                    sections,
-                    scope = Scope.One,
-                    add_self = False,
-                    names_only = True,
-                )
-                graph[project] = set(deps)
-                for dep in deps:
-                    self.__read_dep_graph([dep], sections, graph)
+            deps = self.get_project_refs(
+                [project],
+                ['pkg.requires.jw'],
+                sections,
+                scope = Scope.One,
+                add_self = False,
+                names_only = True,
+            )
+            graph[project] = set(deps)
+            for dep in deps:
+                self.__read_dep_graph([dep], sections, graph)
 
     def __flip_dep_graph(self, graph: Graph) -> Graph:
         ret: Graph = {}