Proposal #88: Restore Kimi K2.6 and remove v1, v2

Update current chain params to register moonshotai/Kimi-K2.6 in the governance model list and remove approved versions v1, v2 from devshard escrow params (to reduce RAM usage).

• Status: Passed (submitted 2026-07-16)
• Tally by voting weight: yes 99.8%, no 0.2%, abstain 0.0%, no with veto 0.0%
• Proposer: gonka1y2a9p56kv044327uycmqdexl7zs82fs5ryv5le
• Messages: MsgUpdateParams, MsgRegisterModel