Prop 35: Software Upgrade: Arkeo Core v1.0.17.1 (LCD Compat + Event Registry Fixes)

Upgrade to v1.0.17.1 adds LCD compatibility for legacy tx search (events→query), restores typed Arkeo events for indexers by registering proto event types, and includes the general upgrade handler. No store migrations are required. Validators must upgrade to the v1.0.17.1 binary before the scheduled height; Cosmovisor is recommended to minimize downtime.