Use PNG for KV memory wall figure; switch outline to inline image embeds

- Convert figs/f4b_pdsep_kv_wall.pdf to PNG via pdftoppm @ 150 DPI so
  MEETING.md and PAPER_OUTLINE.md render the figure inline on GitHub /
  any standard markdown viewer (PDF !() embeds don't render).
- PAPER_OUTLINE.md F2, F4, F6: switch from backtick code references to
  proper ![]() image embeds so the doc is actually viewable as a deck.

Co-Authored-By: Claude Opus 4.7 <noreply@anthropic.com>

microbench/connector_tax/cache_sweep/run_drfix.sh

@@ -25,6 +25,7 @@ PORT="${PORT:-8000}"
 GPU_ID="${GPU_ID:-0}"
 MODEL_PATH="${MODEL_PATH:-$HOME/models/Qwen/Qwen3-Coder-30B-A3B-Instruct}"
 CONFIGS="${CONFIGS:-plain mooncake_both mooncake_both_drfix}"
+SEED="${SEED:-12345}"  # shared seed across configs → identical Poisson + content
 
 DATE="$(date +%Y%m%d_%H%M)"
 RUN_ROOT="$HERE/results/${DATE}_drfix"
@@ -33,7 +34,7 @@ mkdir -p "$RUN_ROOT"
 echo "=== Cache-size sweep + DR-fix A/B ==="
 echo "Run dir   : $RUN_ROOT"
 echo "Configs   : $CONFIGS"
-echo "Rate      : $RATE   Duration: ${DURATION}s"
+echo "Rate      : $RATE   Duration: ${DURATION}s   Seed: $SEED"
 echo ""
 
 kill_all_vllm() {
@@ -114,6 +115,7 @@ for cfg in $CONFIGS; do
         --url "http://127.0.0.1:$PORT/v1/chat/completions" \
         --model "$MODEL_PATH" \
         --rate "$RATE" --duration "$DURATION" \
+        --seed "$SEED" \
         --output-dir "$cfg_dir" 2>&1 | tail -8
 
     curl -s "http://127.0.0.1:$PORT/metrics" > "$cfg_dir/metrics_final.txt" 2>&1 || true