Search mvp

[recalcitrantsupplant]

• Allows specification of filter-to-focus and focus-to-filter filters as Query String Arguments on the search route. Examples:

1. /search?term=contact&method=default& /&_format=text/anot+turtle _adds a triple to the search query of the form ?search_result_uri skos:broader <http://resource.geosciml.org/classifier/cgi/contacttype/metamorphic_contact>_

2. /search?term=address&method=default&filter-to-focus[rdfs:member]=https://linked.data.gov.au/datasets/gnaf _adds a triple to the search query of the form <https://linked.data.gov.au/datasets/gnaf> rdfs:member ?search_result_uri_

3. Search with a filter on multiple objects (the list of objects is treated as an OR)/search?term=address&method=default&filter-to-focus[rdfs:member]=https://linked.data.gov.au/datasets/gnaf,https://linked.data.gov.au/datasets/defg adds a triple to the search query of the form <https://linked.data.gov.au/datasets/gnaf> rdfs:member ?o . VALUES ?o { <https://linked.data.gov.au/datasets/gnaf> <https://linked.data.gov.au/datasets/defg>}

• URIs and CURIEs can be used to specify filters. If CURIEs are used, they should only be CURIEs returned as dcterms:identifier "{identifier}"^^prez:identifier or in prez:links. There is no guarantee prefix declarations in turtle or other RDF serialisations returned by prez are consistent with the prefixes used internally by prez for links and identifiers.
• Adds some common ontologies (dcterms, rdfs etc.) so that annotations for data using these are automatically added to annotated responses
• Sets the timeout to 30s in the shared httpx AsyncClient and Client objects for all calls to the database

[recalcitrantsupplant]

Resolves #153