support kimi 2.5/6 full param and lora

[nanjiangwill]

thanks @GeLee-Q for kimi 2.5 full param support

sglang-miles: sgl-project/sglang#25141
megatron-bridge: radixark/Megatron-Bridge#3

[gemini-code-assist]

Code Review

This pull request introduces support for Kimi VL and Kimi K2.5 models, including specialized weight conversion logic and multimodal token expansion for training. It significantly enhances the LoRA weight synchronization mechanism by implementing IPC staging buffers for faster transfers and a chunked streaming approach to handle large adapters with SGLang. Additionally, it adds support for shared-outer grouped-expert LoRA and updates various utility functions and quantization scripts to accommodate vision-tower and projector components. Feedback was provided to improve the robustness of rollout batch processing by using strict zipping.

[yushengsu-thu]

Upgrade:

• https://github.com/sgl-project/sglang/tree/sglang-miles
• radixark/Megatron-Bridge@f710f81

[yushengsu-thu]

@gongyisheng - weight sync in this PR.

[yushengsu-thu]

sglang-miles: sgl-project/sglang#25141

megatron-bridge:

1. megatron-bridge: support kimi 2.5/6 full + lora(logprob diff exist) Megatron-Bridge#3
   rebase and then
2. backport: compat shims for older Megatron-LM (miles-main / radixark:miles dev image) Megatron-Bridge#6

[yushengsu-thu]

unblock the ci test