minor cleanups in marking partial flows

Summary: Wanted to add a log line to indicate forward progress when building the full flow context + saw a commented out line-of-code that we can kill.

Differential Revision: D63260785

fbshipit-source-id: 0e4ed252c8c95544e7f8aa246af412ec29122708

sapp/pipeline/mark_partial_flows.py

@@ -225,7 +225,6 @@ def _build_candidates_to_transform_from_larger_issue(
                     for frame in initial_postcondition_frames:
                         context.add(FrameKey.from_frame(frame))
                     break
-                    # context.add(FrameKey.from_frame(frame))
             # Search preconditions for the transform. If we find the transform here
             # for a prefix flow, the initial postcondition frame must be marked instead.
             self._build_flow_context_by_searching_graph(
@@ -291,6 +290,7 @@ def run(self, input: TraceGraph, summary: Summary) -> tuple[TraceGraph, Summary]
             context = self._build_full_flow_context(
                 graph, full_issues, partial_flow_to_mark
             )
+            log.info(f"Built full flow context for {len(full_issues)} issues.")
             self._mark_partial_flows(
                 graph, partial_issues, partial_flow_to_mark.feature, context
             )