chore(bot): remove maxSessionTurns and improve artifact archiving

- Removed the `maxSessionTurns: 30` limit from the bot's configuration as requested.
- Added `if: always()` to the `Archive Brain Data` step in the workflow to ensure logs (telemetry, debug) are available even when the agent fails or times out.

.github/workflows/gemini-cli-bot-brain.yml

@@ -254,6 +254,7 @@ jobs:
           fi
 
       - name: 'Archive Brain Data'
+        if: always()
         uses: 'actions/upload-artifact@ea165f8d65b6e75b540449e92b4886f43607fa02' # ratchet:actions/upload-artifact@v4
         with:
           name: 'brain-data'

tools/gemini-cli-bot/.gemini/settings.json

@@ -1,7 +1,4 @@
 {
-  "model": {
-    "maxSessionTurns": 30
-  },
   "security": {
     "environmentVariableRedaction": {
       "allowed": ["GH_TOKEN", "GITHUB_TOKEN"]