Align behavioral event annotation protocol

prepare_easycom_eot_int_review.py

@@ -422,18 +422,21 @@ def derive_protocol_candidates(utterances: Sequence[Utterance], clips: Sequence[
                 reason="short raw wearer pause without sustained competing other takeover; merged into the existing floor episode",
             ), ("WEARER_RESUME", frame, ()))
 
-        # A1: open an opportunity at a non-wearer release and pair it with the
-        # subsequent floor-level wearer entry only if no competing other onset
-        # or wearer activity intervenes. Long silence alone does not invalidate
-        # the opportunity. Unpaired floor onsets are retained as controls.
+        # A1: anchor the observed floor-level wearer entry, then retrieve the
+        # most recent preceding non-wearer release. Keep the pair only if no
+        # competing other onset or wearer activity intervenes. Long silence
+        # alone does not invalidate the opportunity. Unpaired floor onsets are
+        # retained as controls.
         paired_floor_onsets: set[int] = set()
-        for release in other_rows:
-            opportunity_frame = release.dense_end_frame_exclusive
-            onset_frame = next(
-                (value for value in floor_onsets if value >= opportunity_frame), None
-            )
-            if onset_frame is None:
+        for onset_frame in floor_onsets:
+            releases = [
+                row for row in other_rows
+                if row.dense_end_frame_exclusive <= onset_frame
+            ]
+            release = max(releases, key=lambda row: row.dense_end_frame_exclusive, default=None)
+            if release is None:
                 continue
+            opportunity_frame = release.dense_end_frame_exclusive
             wearer_silent = (
                 opportunity_frame == onset_frame
                 or _all_state(