refactor to use events without registry or acl #112

Job	Run time
test (gno.land/r/linker000/discord/role/v0)	13s
test (gno.land/r/linker000/discord/keyring/v0)	14s
test (gno.land/r/linker000/discord/user/v0)	12s
deploy-caddy	0s
deploy-gnoland	0s
	39s

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