Optimize model selection: opus for leadership, sonnet for ICs

CEOs and CTOs stay on claude-opus-4-6 (strategy, architecture, judgment).
IC agents move to claude-sonnet-4-6 (implementation, routine execution).
Lint Roller set up as opencode_local with minimax-m2.5 (matching Regina).

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

cmo/CONFIG.md

@@ -35,7 +35,7 @@
     "GITHUB_APP_ID_ADDISON": { "type": "plain", "value": "3097914" },
     "GITHUB_PEM_PATH_ADDISON": { "type": "plain", "value": "/paperclip/secrets/github-pems/privilegedescalation.pem" }
   },
-  "model": "claude-opus-4-6",
+  "model": "claude-sonnet-4-6",
   "effort": "medium",
   "graceSec": 15,
   "timeoutSec": 0,

engineering/gandalf/CONFIG.md

@@ -35,7 +35,7 @@
     "GITHUB_APP_ID_GANDALF": { "type": "plain", "value": "3097914" },
     "GITHUB_PEM_PATH_GANDALF": { "type": "plain", "value": "/paperclip/secrets/github-pems/privilegedescalation.pem" }
   },
-  "model": "claude-opus-4-6",
+  "model": "claude-sonnet-4-6",
   "graceSec": 15,
   "timeoutSec": 0,
   "maxTurnsPerRun": 80,

engineering/hugh/CONFIG.md

@@ -35,7 +35,7 @@
     "GITHUB_APP_ID_HUGH": { "type": "plain", "value": "3097914" },
     "GITHUB_PEM_PATH_HUGH": { "type": "plain", "value": "/paperclip/secrets/github-pems/privilegedescalation.pem" }
   },
-  "model": "claude-opus-4-6",
+  "model": "claude-sonnet-4-6",
   "effort": "medium",
   "graceSec": 15,
   "timeoutSec": 0,