feat: check and support native structured output for different model platforms

[Zephyroam]

Related Issue

Closes #1695

Description

Platform Structured Output Support Reference

Platform	Backend Class	Camel Code Status	Official Docs	Comments
AIHUBMIX	AihubMixModel	JSON_SCHEMA	https://docs.aihubmix.com/en/api/Aihubmix-Integration	OpenAI Compatible, Not explicitly documented
AIML	AIMLModel	JSON_SCHEMA	https://docs.aimlapi.com/api-references/text-models-llm/openai/gpt-5	Only a subset of models support JSON_SCHEMA
ANTHROPIC	AnthropicModel	/ (leave DEFAULT)	https://platform.claude.com/docs/en/build-with-claude/structured-outputs	Handled in #3821
ATLASCLOUD	AtlasCloudModel	JSON_SCHEMA	https://www.atlascloud.ai/docs/en/createChatCompletion	OpenAI Compatible, Not explicitly documented
AWS_BEDROCK	AWSBedrockModel	JSON_SCHEMA	https://docs.aws.amazon.com/bedrock/latest/userguide/structured-output.html	Only support bedrock native API, handled in #3901
AZURE	AzureOpenAIModel	JSON_SCHEMA	https://learn.microsoft.com/azure/ai-services/openai/how-to/structured-outputs	Native support
CEREBRAS	CerebrasModel	JSON_SCHEMA	https://inference-docs.cerebras.ai/resources/openai	OpenAI Compatible
COHERE	CohereModel	JSON_SCHEMA	https://docs.cohere.com/docs/structured-outputs	Native json_object with schema field
COMETAPI	CometAPIModel	JSON_SCHEMA	https://apidoc.cometapi.com/	OpenAI Compatible, Not explicitly documented
CRYNUX	CrynuxModel	JSON_SCHEMA	https://docs.crynux.ai/	Not explicitly documented
DEEPSEEK	DeepSeekModel	JSON_OBJECT	https://api-docs.deepseek.com/guides/json_mode
GEMINI	GeminiModel	JSON_SCHEMA	https://ai.google.dev/gemini-api/docs/structured-output
GROQ	GroqModel	JSON_SCHEMA	https://console.groq.com/docs/structured-outputs	Only a subset of models support JSON_SCHEMA
INTERNLM	InternLMModel	JSON_SCHEMA	https://internlm.intern-ai.org.cn/api/document	Not explicitly documented
LITELLM	LiteLLMModel	JSON_SCHEMA	https://docs.litellm.ai/docs/completion/json_mode	Only a subset of models support JSON_SCHEMA
LMSTUDIO	LMStudioModel	JSON_SCHEMA	https://lmstudio.ai/docs/developer/openai-compat/structured-output
MINIMAX	MinimaxModel	JSON_SCHEMA	https://platform.minimax.io/docs/api-reference/text-openai-api	OpenAI Compatible, Not explicitly documented
MISTRAL	MistralModel	JSON_OBJECT	https://docs.mistral.ai/capabilities/structured_output/
MOONSHOT	MoonshotModel	JSON_OBJECT	https://platform.moonshot.cn/docs/guide/use-json-mode-feature-of-kimi-api
NOVITA	NovitaModel	JSON_SCHEMA	https://novita.ai/docs/api-reference/model-apis-llm-create-chat-completion	OpenAI Compatible, Not explicitly documented
OPENAI	OpenAIModel	JSON_SCHEMA	https://platform.openai.com/docs/guides/structured-outputs	Native support
OPENROUTER	OpenRouterModel	JSON_SCHEMA	https://openrouter.ai/docs/features/structured-outputs	Only a subset of models support JSON_SCHEMA
PPIO	PPIOModel	JSON_SCHEMA	https://ppio.com/docs/model/llm-structured-outputs	Only a subset of models support JSON_SCHEMA
QIANFAN	QianfanModel	JSON_OBJECT	https://cloud.baidu.com/doc/qianfan-api/s/3m7of64lb
QWEN	QwenModel	JSON_SCHEMA	https://help.aliyun.com/zh/model-studio/qwen-structured-output	Only a subset of models support JSON_SCHEMA
REKA	RekaModel	JSON_SCHEMA	https://docs.reka.ai/research/structured-output
SAMBA	SambaModel	JSON_SCHEMA	https://docs.sambanova.ai/docs/en/features/function-calling
SILICONFLOW	SiliconFlowModel	JSON_OBJECT	https://docs.siliconflow.cn/cn/userguide/guides/json-mode
TOGETHER	TogetherAIModel	JSON_SCHEMA	https://docs.together.ai/docs/json-mode	Only a subset of models support JSON_SCHEMA
VOLCANO	VolcanoModel	JSON_SCHEMA	https://www.volcengine.com/docs/82379/1568221
YI	YiModel	JSON_SCHEMA	https://platform.lingyiwanwu.com/docs	OpenAI Compatible, Not explicitly documented
ZHIPU	ZhipuAIModel	JSON_OBJECT	https://open.bigmodel.cn/dev/howuse/jsonformat

What is the purpose of this pull request?

• Bug fix
• New Feature
• Documentation update
• Other

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[Wendong-Fan]

added enhance in #3930, feel free to check

[fengju0213]

thanks @Zephyroam desides what Wendong has already corrected,find a issue.

[fengju0213]

should we remove response_format here？

[fengju0213]

overall ，looks good to me now，thanks @Zephyroam still need some time to check the model doc，will give you feedback within today
btw，pytest need be fixed

[fengju0213]

i think qwenmodel need change to json object according to docs

[fengju0213]

fixed the qwen model and cicdi ，also migrated the JSON prompt injection logic from the latest user message to the system message, as injecting it into user messages could interfere with KV cache reuse.