Adds UpdateRule/ExportRules/ImportRules/GetExecutionLogs to the
authenticated Filters gRPC service and rewires the CLI's
filter edit/export/import/logs subcommands onto it, replacing their
throwaway ephemeral local-db reads with the daemon's real, persistent
store and live FilterEngine. ImportRules now reports per-line parse
failures instead of silently dropping them.
Regenerates the nuncio-proto contract-stability golden for the
additive proto changes.
Refs #192
James Maes