EAR outline: copy reusable figures, mark migration sections deferred

- replayer/replay.py: emit trace_span_s and amplification in summary
  (Phase 1 of the wall-clock amplification measurement plan; needed for
  §2.3 dispatch coupling empirical closure)
- figs/: 8 reusable figures copied from analysis/ with paper-spec names
  (f2a/b/c workload, f4a/b/c/d failure modes, f6 e2e partial)
- PAPER_OUTLINE.md: real figure paths, explicit TBD markers for
  custom drawings and pending data; new "Validation Status" table at top
  and reorganized "Work Plan" splitting can-do-now vs migration-deferred

Migration validation deferred per user: 4 prior attempts (6b255fa,
e991960/5772149, cc6e562, 4c583f2) were reverted due to transfer
overhead; pending re-test on top of connector_tax DR-fix.

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

replayer/replay.py

@@ -422,6 +422,8 @@ async def replay_trace(config: ReplayConfig) -> list[RequestMetrics]:
     summary["external_cache_hits_tokens"] = int(delta_ext_hits)
     summary["external_cache_hit_ratio"] = ext_hit_ratio
     summary["wall_clock_s"] = sweep_elapsed
+    summary["trace_span_s"] = trace_span
+    summary["amplification"] = sweep_elapsed / trace_span if trace_span > 0 else None
     summary_path.write_text(_json.dumps(summary, indent=2, sort_keys=True))
 
     logger.info("Summary written to %s", summary_path)