Update/remove immediateAcquisition domain

[kirkhess]

In the current conversion specs, bf:immediateAcquisition has a domain of bf:Item.

However, the current specifications map it also a bf:Instance so the domain needs to be updated or removed.

<bf:Instance rdf:about="http://id.loc.gov/resources/instances/23694412">
...
		<bf:immediateAcquisition>
			<bf:ImmediateAcquisition>
				<rdfs:label>Gift; Kevork Koushagjian and Zepure Koushagjian; New Milford, New Jersey; 2022/11/01</rdfs:label>
				<bflc:applicableInstitution>
					<madsrdf:CorporateName rdf:about="http://id.loc.gov/vocabulary/organizations/dlc">
						<rdfs:label>United States, Library of Congress</rdfs:label>
						<bf:code rdf:datatype="http://id.loc.gov/datatypes/orgs/code">DLC</bf:code>
						<bf:code rdf:datatype="http://id.loc.gov/datatypes/orgs/normalized">dlc</bf:code>
						<bf:code rdf:datatype="http://id.loc.gov/datatypes/orgs/iso15511">US-dlc</bf:code>
					</madsrdf:CorporateName>
				</bflc:applicableInstitution>
			</bf:ImmediateAcquisition>
		</bf:immediateAcquisition>
...
</bf:Instance>

[klngwll]

I am not entirely sure what the purpose of it being on the bf:Instance would be other than convenience? A suggestion that could make sense perhaps, would be to at point it to an item through a blank node therefore not treating unique or historical things differently within the model, since we are still talking about an Item here right? I'd love to hear your thoughts on this especially those knowledgable working with these kind of materials.

Suggestion in turtle:

<x> a bf:Instance ;
  bf:hasItem [ a bf:Item ;
     bf:ImmediateAcquisition [ a bf:ImmediateAcquisition ;
        rdfs:label "Gift; Kevork Koushagjian and Zepure Koushagjian; New Milford, New Jersey; 2022/11/01" ;
        ...
  ]
]