feat: GridBot als zweite Paper-Engine — No-Stop-XRP-Grid live

processGridCycle (Paritätstest gegen runGridBacktest), GridEngine mit
DB-Recovery (grid_state/grid_lots, bot_state id=2), bot-Spalte in
paper_trades/equity_snapshots, /api/grid, Dashboard-Panel.
Bewusster Paper-Probelauf trotz Gate-Fail (User-Entscheidung 2026-06-10).

Co-Authored-By: Claude Fable 5 <noreply@anthropic.com>

drizzle/meta/_journal.json

@@ -15,6 +15,13 @@
       "when": 1781071452889,
       "tag": "0001_certain_omega_red",
       "breakpoints": true
+    },
+    {
+      "idx": 2,
+      "version": "7",
+      "when": 1781076227862,
+      "tag": "0002_burly_joystick",
+      "breakpoints": true
     }
   ]
 }