Change Details

Part of [[ https://linear.app/comm/issue/ENG-5842/delete-old-device-list-attributes-after-migration | ENG-5842 ]]. Previous approach to passing inbound/outbound keys was using `HashMaps` of strings to strings. Also, with new device list, we were serializing these to hashmaps, just to parse them back a few lines later. This was error prone and hard to maintain, so this diff introduces new, simplified and type-safe structs for inbound/outbound keys. Also, moved the logic for checking social proof existence directly into gRPC handlers, for brevity. Note that this touches recently introduced `identifier` response field, cc @will Depends on D10700

Part of [[ https://linear.app/comm/issue/ENG-5842/delete-old-device-list-attributes-after-migration | ENG-5842 ]]. Previous approach to passing inbound/outbound keys was using `HashMaps` of strings to strings. Also, with new device list, we were serializing these to hashmaps, just to parse them back a few lines later. This was error prone and hard to maintain, so this diff introduces new, simplified and type-safe structs for inbound/outbound keys. Also, removed the logic for checking social proof existence for each device, which turned out to be incorrect. The social proof is still checked when creating the `EthereumIdentity` response struct. Depends on D10700

Part of [[ https://linear.app/comm/issue/ENG-5842/delete-old-device-list-attributes-after-migration | ENG-5842 ]]. Previous approach to passing inbound/outbound keys was using `HashMaps` of strings to strings. Also, with new device list, we were serializing these to hashmaps, just to parse them back a few lines later. This was error prone and hard to maintain, so this diff introduces new, simplified and type-safe structs for inbound/outbound keys. Also, removed the logic for checking social proof existence directly into gRPC handlers, for brevity.for each device, Note that this touches recently introduced `identifier` response field,which turned out to be incorrect. cc @willThe social proof is still checked when creating the `EthereumIdentity` response struct. Depends on D10700