v0.15.2

• (client) Changed member-fetching methods to clear existing member info in state store.
• (client) Added support for inserting mautrix-go commit hash into default user agent at compile time.
• (bridge) Fixed bridge bot intent not having state store set.
• (client) Fixed RespError marshaling mutating the ExtraData map and potentially causing panics.
• (util/dbutil) Added DoTxn method for an easier way to manage database transactions.
• (util) Added a zerolog CallerMarshalFunc implementation that includes the function name.
• (bridge) Added error reply to encrypted messages if the bridge isn't configured to do encryption.