Fuseki importer

[ddeboer]

Summary

Add a Fuseki/Jena TDB2 importer as an alternative to @lde/sparql-qlever for @lde/sparql-importer.

Context

The loda-pipeline uses Apache Jena Fuseki with TDB2 as its local SPARQL store. To reimplement loda-pipeline in LDE, we need a Fuseki-compatible importer that can:

1. Load RDF dumps into a TDB2 database (via tdb2.tdbloader or Graph Store Protocol)
2. Start a Fuseki SPARQL endpoint over that database
3. Return the endpoint URL for DistributionResolver

Approach

Implement the existing Importer interface from @lde/sparql-importer, similar to how @lde/sparql-qlever implements it for Qlever. Use @lde/task-runner to manage the Fuseki Docker container lifecycle.

Relates to

• Data Pipelines Framework #78