gate-evidence: window FUT-action counts to the gate, not the whole log

'pack opens recorded: 45' appeared in the gate 8 report. The UTAS log is
cumulative across the entire deployment, so a bare count reads as if 45 packs
were opened during that gate; the real number was 1.

Now reports both, labelled, windowed from the sidecar's start time (it is
restarted per gate, so that is the gate boundary). A bare count in a gate
report will be read as belonging to that gate, so it has to be the one that
does.

Third counting bug in this tooling: the trace frame counter matched OPEN/CLOSE
markers, the capture and trace were read seconds apart during a live session,
and now this. Evidence tooling gets the same scrutiny as the code under test.

Co-Authored-By: Claude Opus 5 (1M context) <noreply@anthropic.com>

openfut-blaze-host/gate-evidence.sh

@@ -164,10 +164,21 @@ UTASLOG=/tmp/utas_server.log
 if docker exec openfut-fut-backend test -f "$UTASLOG" 2>/dev/null; then
   docker exec openfut-fut-backend sh -c "grep -E 'STORE:|SQUAD:|SBC:|TRADE:' $UTASLOG" \
     > "$DEST/utas-actions.log" 2>/dev/null || true
-  packs="$(grep -c 'opened pack' "$DEST/utas-actions.log" 2>/dev/null || echo 0)"
-  both "  pack opens recorded: $packs"
-  both "  most recent actions:"
-  tail -5 "$DEST/utas-actions.log" 2>/dev/null | sed 's/^/    /' | tee -a "$DEST/summary.txt" || true
+  # Window to THIS gate. The UTAS log is cumulative across the whole
+  # deployment, so a raw count reads as if 45 packs were opened in this gate.
+  # The sidecar is restarted per gate, so its first log line is the window
+  # start. Both numbers are reported, labelled, because a bare count in a gate
+  # report is read as belonging to that gate.
+  since="$(head -1 "$LOGFILE" 2>/dev/null | sed -E 's/^\[([0-9]+)\..*/\1/')"
+  since_hm="$(date -d "@${since:-0}" '+%H:%M' 2>/dev/null || echo '00:00')"
+  all_packs="$(grep -c 'opened pack' "$DEST/utas-actions.log" 2>/dev/null || echo 0)"
+  gate_packs="$(awk -F'[][]' -v t="$since_hm" '$2>=t' "$DEST/utas-actions.log" 2>/dev/null \
+                 | grep -c 'opened pack' || echo 0)"
+  both "  pack opens THIS GATE (since $since_hm): $gate_packs"
+  both "  pack opens in the whole log (cumulative, all deployments): $all_packs"
+  both "  actions this gate:"
+  awk -F'[][]' -v t="$since_hm" '$2>=t' "$DEST/utas-actions.log" 2>/dev/null | tail -6 \
+    | sed 's/^/    /' | tee -a "$DEST/summary.txt" || true
 else
   both "  utas log not readable"
 fi