v4.1.8 — consistent attestor_ Docker naming

Every Docker container, volume, network, and the compose project is now named attestor_… — so docker ps -a | grep attestor, docker volume ls | grep attestor, and docker network ls | grep attestor list everything Attestor owns.

• Containers: attestor_postgres_document_db, attestor_pinecone_vector_db, attestor_neo4j_graph_db (+ attestor_api).
• Compose project attestor → volumes attestor_postgres_data/…, network attestor_default.
• quickstart health-wait + docs + uninstall scans updated; uninstall docker filter broadened to name=attestor (matches both the new underscore names and the legacy attestor-*-local).

Install: pipx install attestor==4.1.8 then attestor quickstart.