feat(shipote): CPU% + pipeline live-tail + replay por bytes (fase J)

- CPU% derivado server-side entre samples (WorkspaceState.last_cpu_sample).
  100% = 1 core saturado. Primer sample devuelve None (sin baseline).
- shipote pipeline run --tail: tras lanzar, suscribe al primer flow_socket
  y vuelca bytes hasta EOF. Auto-implica --tap.
- DiscernPolicy.replay_bytes: cap adicional por bytes para el replay
  buffer del FlowChannel. evict_for_incoming considera el chunk entrante
  para que post-push el buffer NUNCA exceda los caps.
- shipote-shell: stats history extiende sparkline con %CPU.

80 tests pasan (ente-incarnate 16, nouser-core 27, shipote-card 8,
shipote-core 21, shipote-discern 5, yahweh-provider-fs 3).

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

crates/apps/shipote-shell/src/main.rs

@@ -389,19 +389,24 @@ impl Render for Shell {
                     .map(|h| h.iter().map(|s| s.rss_bytes.unwrap_or(0)).collect())
                     .unwrap_or_default();
                 let spark = sparkline(&rss_series, STATS_HISTORY_LEN);
-                let (rss_now, peak) = history
-                    .and_then(|h| h.back())
-                    .map(|s| (s.rss_bytes.unwrap_or(0), s.rss_peak_bytes.unwrap_or(0)))
-                    .unwrap_or((0, 0));
+                let latest = history.and_then(|h| h.back());
+                let (rss_now, peak, cpu_pct) = latest
+                    .map(|s| (
+                        s.rss_bytes.unwrap_or(0),
+                        s.rss_peak_bytes.unwrap_or(0),
+                        s.cpu_percent.unwrap_or(0.0),
+                    ))
+                    .unwrap_or((0, 0, 0.0));
                 let rss_mb = rss_now as f64 / 1024.0 / 1024.0;
                 let peak_mb = peak as f64 / 1024.0 / 1024.0;
                 format!(
-                    "{:<14} {:<14} {} {:>6.1}M peak {:>6.1}M",
+                    "{:<14} {:<14} {} {:>6.1}M peak {:>6.1}M  {:>5.1}%cpu",
                     &w.id.to_string()[20..],
                     w.label,
                     spark,
                     rss_mb,
                     peak_mb,
+                    cpu_pct,
                 )
             })
             .collect();