add to active ontology should use the term iri for the page not the backend hostname

https://github.com/MetaCell/interlex/blob/5643e34d456c3bcc0c62c4569231ba03a5939aa7/src/api/endpoints/apiService.ts#L316

`{API_CONFIG.OLYMPIAN_GODS}` should not be used, it should be e.g. `http://uri.interlex.org/base/ilx_1234567` if the user was viewing base or `http://uri.interlex.org/tgbugs/ilx_1234567` if they were viewing my perspective. In this case follow what the jsonld returns now.

For adding from the search results page use base for now.

Start in src/api/endpoints/apiService.ts at the linked line and inspect the JSON-LD returned for the current page. Verify how the base and perspective term IRIs are represented, then check the search-results path. Done means adding to the active ontology uses the page's term IRI, with base used for search results.

Written by the indexing model from the issue text.