feat: add taxonomy classify service + /classify endpoint

- scripts/taxonomy.py: shared taxonomy with 14 categories, keyword scorer
  and classify_text() function
- scripts/classify_server.py: FastAPI service — forwards to kreuzberg /extract,
  applies taxonomy, returns category/subcategory/confidence alongside full kreuzberg response
- Dockerfile.classify: lightweight Python image for classify service
- classify.nomad: Nomad job → classify.i80.dk
- .gitea/workflows/classify.yml: CI/CD pipeline (build + deploy)
- analyse_familie.py: refactored to import from taxonomy.py (no duplication)
- .gitignore: exclude dokumenter_keywords.* and extract_all.log

.gitignore

@@ -245,6 +245,12 @@ obj/
 pkg/
 
 
+# Doc classifier output files
+dokumenter_keywords.json
+dokumenter_keywords.classified.csv
+dokumenter_keywords.misplaced.csv
+extract_all.log
+
 # Local dev artifacts
 docs/demo-dev.html
 docs/serve.json