better represent structure in mermaid graph

[mikemrm]

This better represents the action and action relationship lookups in mermaid graphs.

Before:

erDiagram
	rolebinding }o--o{ rolev2 : role
	rolebinding }o--o{ user : subject
	rolebinding }o--o{ client : subject
	rolebinding }o--o{ group : subject
	user {
		id_prefix idntusr
	}
	client {
		id_prefix idntclt
	}
	role {
		id_prefix permrol
	}
	role }o--o{ subject: subject
	tenant {
		id_prefix tnntten
	}
	tenant }o--o{ tenant: parent
	tenant }o--o{ rolebinding: grant
	group {
		id_prefix idntgrp
		subgroup_action member
	}
	group }o--o{ rolebinding: grant
	group }o--o{ group: parent
	group }o--o{ tenant: parent
	group }o--o{ user: direct_member
	group }o--o{ client: direct_member
	group }o--o{ group: subgroup
	loadbalancer {
		id_prefix loadbal
		action loadbalancer_get
		action loadbalancer_update
		action loadbalancer_delete
	}
	loadbalancer }o--o{ resourceowner: owner
	loadbalancer }o--o{ rolebinding: grant
	resourceowner {
	}
	resourceowner ||--|| tenant: alias
	resourcemanager {
		action role_create
		action role_get
		action role_list
		action role_update
		action role_delete
		action loadbalancer_create
		action loadbalancer_get
		action loadbalancer_list
		action loadbalancer_update
		action loadbalancer_delete
	}
	resourcemanager ||--|| tenant: alias
	resourcemanager ||--|| group: alias
	subject {
	}
	subject ||--|| user: alias
	subject ||--|| client: alias

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After:

erDiagram
	rolebinding }o--o{ rolev2 : role
	rolebinding }o--o{ user : subject
	rolebinding }o--o{ client : subject
	rolebinding }o--o{ group : subject
	user {
		id_prefix idntusr
	}
	client {
		id_prefix idntclt
	}
	role {
		id_prefix permrol
	}
	role }o--o{ subject: subject
	tenant {
		id_prefix tnntten
	}
	tenant }o--o{ tenant: parent
	tenant }o--o{ rolebinding: grant
	group {
		id_prefix idntgrp
		action member "direct_member> | subgroup>member"
	}
	group }o--o{ rolebinding: grant
	group }o--o{ group: parent
	group }o--o{ tenant: parent
	group }o--o{ user: direct_member
	group }o--o{ client: direct_member
	group }o--o{ group: subgroup
	loadbalancer {
		id_prefix loadbal
		action loadbalancer_delete "self"
		action loadbalancer_get "self"
		action loadbalancer_update "self"
	}
	loadbalancer }o--o{ resourceowner: owner
	loadbalancer }o--o{ rolebinding: grant
	resourceowner {
	}
	resourceowner ||--|| tenant: alias
	resourcemanager {
		action loadbalancer_create "self"
		action loadbalancer_delete "self"
		action loadbalancer_get "self"
		action loadbalancer_list "self"
		action loadbalancer_update "self"
		action role_create "self"
		action role_delete "self"
		action role_get "self"
		action role_list "self"
		action role_update "self"
	}
	resourcemanager ||--|| tenant: alias
	resourcemanager ||--|| group: alias
	subject {
	}
	subject ||--|| user: alias
	subject ||--|| client: alias

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