feat(sparql-anything): add SparqlAnythingConverter for chunked non-RDF to RDF conversion

[ddeboer]

Summary

Adds the @lde/sparql-anything package with a SparqlAnythingConverter — the first LDE piece of the geonames-rdf migration. It ports geonames-rdf's map.sh convert loop to TypeScript on top of an @lde/task-runner. Convert-only scope (no selector, transform, validation, or chaining).

What it does

new SparqlAnythingConverter({ queryFile, jarPath, adminCodesFile, taskRunner }).convert(chunkPaths, outputPath):

• Runs the SPARQL Anything CLI once per input chunk to bound memory use (fx:ondisk plus per-process isolation), then stream-concatenates the per-chunk N-Triples into a single output file. Streaming keeps multi-gigabyte outputs out of memory; N-Triples has no prefixes or document structure, so plain concatenation is always valid.
• Substitutes each chunk's path into the query's {SOURCE} placeholder through a temporary -q file, rather than map.sh's inline --query "$(sed …)". A temp file sidesteps shell-escaping a large SPARQL query passed to a shell: true runner.
• Aborts the whole conversion when any chunk's process exits non-zero (the runner's wait() rejects), so a crashed chunk can never be silently dropped from the output — the file-output equivalent of map.sh's set -e.

It is not a pipeline Executor: it produces a file, not quads, so it sits standalone rather than inside Pipeline → Stage → Executor. Chunking stays in the caller (geonames download.sh); the converter consumes pre-split chunks.

Design notes

• The converter takes a TaskRunner rather than spawning processes itself, so it runs unchanged on the host (NativeTaskRunner), in Docker, or anywhere else.
• Implementation lives in src/sparql-anything-converter.ts (re-exported from index.ts) so V8 coverage measures it — the base config excludes **/index.ts.

Tests

Unit tests drive the converter through a stubbed TaskRunner (vertical TDD slices): the per-chunk CLI contract (-q temp file, --load, --format NT, --output), {SOURCE} substitution, multi-chunk concatenation order, and the fail-fast abort contract. 100% coverage.

The real-jar integration test (actual SPARQL Anything jar over a tiny CSV fixture) and the geonames-rdf consumption bridge (how the shell/Docker repo invokes a TS converter) are deferred follow-ups.