nemotron-tool-repair: suppress submit-tool hallucination for Qwen Coder models

Qwen Coder models are trained on agent frameworks that include a "submit"
tool as a task-completion signal, causing "Tool submit not found" errors.
Adds QWEN_TOOL_DISCIPLINE injected unconditionally into the system prompt
for all Qwen Coder models, redirecting them to respond directly or use
`ask done uuid:<uuid>` for tracked tasks. Also adds the same submit hint
to NEMOTRON_TOOL_DISCIPLINE for consistency.

Co-Authored-By: Claude Sonnet 4.6 <noreply@anthropic.com>

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