mavgpud: turn gemma's thinking off in the chat template (V-489)

Owner's call, 02-08-2026. Without it the 12B spends the reply budget on
reasoning tokens and answers empty at low max_tokens. Verified on the box:
"Столица Франции?" now answers "Париж" with no reasoning_content.

deploy/mavgpud.json

@@ -15,6 +15,7 @@
     "--batch-size", "2048",
     "--ubatch-size", "512",
     "--jinja",
+    "--chat-template-kwargs", "{\"enable_thinking\":false}",
     "--spec-type", "draft-mtp",
     "--spec-draft-n-max", "2"
   ],