Add MiniMax web search MCP to VP Product and CMO agents

- .mcp.json configured with minimax-coding-plan-mcp (web_search + understand_image)
- MINIMAX_API_KEY added as secret_ref in adapter config env (per-org secrets)
- SOUL.md updated with web search usage guidance
- Keys stored in Paperclip secrets, not in repo

Co-Authored-By: Paperclip <noreply@paperclip.ing>

cmo/CONFIG.md

@@ -32,6 +32,7 @@
   "cwd": "/paperclip/privilegedescalation/agents/cmo",
   "env": {
     "HOME": { "type": "plain", "value": "/paperclip/privilegedescalation/agents/cmo" },
+    "MINIMAX_API_KEY": { "type": "secret_ref", "secretId": "fc5a9197-9084-4478-a63d-b1c00a901f9e" },
     "GITHUB_APP_ID_ADDISON": { "type": "plain", "value": "3140977" },
     "GITHUB_PEM_PATH_ADDISON": { "type": "plain", "value": "/paperclip/secrets/github-pems/privilegedescalation-ceo.pem" }
   },