Fix DeepSeek R1 parallel tool calls and add fixed template tests
- Add optional newline handling between consecutive tool calls
- Make <|tool▁calls▁end|> optional (template bug workaround)
- Add DeepSeek R1 (fixed) template to needle tests
- Set ToolsEmitContentWithCalls::No for both DeepSeek R1 templates
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Co-Authored-By: Claude Opus 4.5 <noreply@anthropic.com>