reset partial flow counters across flows-to-mark

Summary: Noticed that we weren't resetting these properly.

Reviewed By: marat-turaev

Differential Revision: D63333668

fbshipit-source-id: 2a89b247d5e6cc4409ff2c7285730e6cdaa633e7

sapp/pipeline/mark_partial_flows.py

@@ -282,6 +282,8 @@ def run(self, input: TraceGraph, summary: Summary) -> tuple[TraceGraph, Summary]
                 graph, full_issues, partial_flow_to_mark
             )
             log.info(f"Built full flow context for {len(full_issues)} issues.")
+            self.partial_flow_features_added = 0
+            self.partial_flow_frames = 0
             self._mark_partial_flows(
                 graph, partial_issues, partial_flow_to_mark.feature, context
             )