Switch CMOs and QAs to minimax/MiniMax-M2.7 direct (no OpenRouter)

CMOs (Savannah, Addison, Clipper):
- Switched from claude_local/sonnet to opencode_local/minimax
- Uses MINIMAX_API_KEY secret_ref (direct MiniMax API, not OpenRouter)
- opencode.json with web search MCP
- Removed .mcp.json (claude_local only)
- promptTemplate required in DB (no instructionsFilePath)

QAs (Betty, Regina, Lint Roller):
- Switched from openrouter/minimax to minimax direct
- Model: minimax/MiniMax-M2.7 (was openrouter/minimax/minimax-m2.7)
- Uses MINIMAX_API_KEY instead of OPENROUTER_API_KEY

VP Products: unchanged (stay on opus, .mcp.json for web search MCP only)

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

cmo/opencode.json

@@ -0,0 +1,20 @@
+{
+  "$schema": "https://opencode.ai/config.json",
+  "permission": "allow",
+  "experimental": {
+    "snapshots": false
+  },
+  "mcp": {
+    "minimax-search": {
+      "type": "local",
+      "command": [
+        "uvx",
+        "minimax-coding-plan-mcp",
+        "-y"
+      ],
+      "environment": {
+        "MINIMAX_API_HOST": "https://api.minimax.io"
+      }
+    }
+  }
+}