Implement ProvApi

[Stefan Bieliauskas]

Implement following methods in the ProvApi class:

• create_document_form_prov(content=ProvDocument) ✅
• get_document_as_prov(document_id: string): ProvDocument

Pseudocode for the get_document_as_prov(document_id) method as far as I have been thinking:

# 
#get document from adapter
#
#foreach bundle in document.bundles
#    foreach record in records and relations 
#        add namespaces from record to bundle 
#        check if record belong to this bundle (bundle links) ?????(test!)  
#        skip all records of prov:type "prov:Unknown"   
#        create record in bundle  
# 
# 
#

create record(prov_bundle, attributes, metadata)

# set prov_type from metadata 
# set prov_label from metadata 
# zip type_map and properties together 
# use create_record method from jsondeserializer

Pseudocode for the create_document_from_prov(ProvDocument) method as far as I have been thinking:

# create document id
# create document records / relations (The same code like with bundles)
#
#foreach bundle
#    create bundle id
#
#    foreach record in bundle : 
#        prepare metadata (like labels, namespaces, type_map) as primitive datatypes 
#        create database node
#        create relation between bundle node and record node 
#
#    foreach relation in bundle: 
#        skip relations of the type "prov:mentionOf" 
#        if target or origin record is unknown, create node "Unknown" 
#        prepare metadata (like labels, namespaces, type_map) as primitive datatypes 
#        create database relation 
# 
# 
#foreach bundle in bundles 
#    foreach relation in bundle 
#        if the relation type is"prov:mentionOf" (https://www.w3.org/TR/prov-links/)
#             create relation