Proposal #78: Governance 17: update PoC model lineup

Set delegation initial model id to MiniMaxAI/MiniMax-M2.7, keep only MiniMaxAI/MiniMax-M2.7 in PoC params, remove Qwen/Qwen3-235B-A22B-Instruct-2507-FP8, moonshotai/Kimi-K2.6 from PoC params, and delete Qwen/Qwen3-235B-A22B-Instruct-2507-FP8, moonshotai/Kimi-K2.6 from governance models.

• Status: Passed (submitted 2026-06-25)
• Tally by voting weight: yes 97.1%, no 0.1%, abstain 2.8%, no with veto 0.0%
• Proposer: gonka1y2a9p56kv044327uycmqdexl7zs82fs5ryv5le
• Messages: MsgUpdateParams, MsgDeleteGovernanceModel ×2