feat(supplier): add 3 kimi replicas + raise all kimi caps to OpenRouter max

Add 3 parallel-capacity replicas of supplier-kimi (kimi-2/3/4) so the
marketplace can serve more concurrent jobs from the independent buyer
machines. Each is a single-slot worker on the same capability
(llm.text.generate.v1) and model (moonshotai/kimi-k2.6) at the same 0.2 AP3X
flat price, sharing the one OpenRouter key (accepted concurrency ceiling).

Also bring the original supplier-kimi up to the same config: raise its advert
caps (re-posted on-chain) and OPENAI_TIMEOUT_MS to match. All four kimi
suppliers now advertise max_output_tokens=262144, max_processing_ms=3600000
(OpenRouter's ceiling for kimi-k2.6), with OPENAI_TIMEOUT_MS=3600000 so the
upstream call isn't cut short before the advertised deadline.

- deploy/mainnet/docker-compose.supplier-kimi-{2,3,4}.yml (new)
- deploy/mainnet/docker-compose.supplier-kimi.yml: OPENAI_TIMEOUT_MS 300000 -> 3600000
- buyer/scripts/monitor-wallets.ts: register the 3 replica wallets

Per-instance wallets, .env files, and on-chain adverts are provisioned on the
mainnet host (gitignored); all four containers are live and Active on-chain.

Co-Authored-By: Claude Opus 4.8 <noreply@anthropic.com>

buyer/scripts/monitor-wallets.ts

@@ -83,6 +83,27 @@ const OPERATOR_SOURCES: OperatorSource[] = [
     keyVar: "SUPPLIER_PRIV_KEY_HEX",
     role: "supplier",
   },
+  {
+    label: "supplier-kimi-2@vector-marketplace",
+    host: "root@91.98.147.172",
+    envPath: "/root/agents-marketplace/supplier/.env.kimi-2",
+    keyVar: "SUPPLIER_PRIV_KEY_HEX",
+    role: "supplier",
+  },
+  {
+    label: "supplier-kimi-3@vector-marketplace",
+    host: "root@91.98.147.172",
+    envPath: "/root/agents-marketplace/supplier/.env.kimi-3",
+    keyVar: "SUPPLIER_PRIV_KEY_HEX",
+    role: "supplier",
+  },
+  {
+    label: "supplier-kimi-4@vector-marketplace",
+    host: "root@91.98.147.172",
+    envPath: "/root/agents-marketplace/supplier/.env.kimi-4",
+    keyVar: "SUPPLIER_PRIV_KEY_HEX",
+    role: "supplier",
+  },
   {
     label: "buyer@open-webui",
     host: "open-webui",