Remove automatic generated property columns

The columns could only be text, since a typed column makes Cypher writes
fail on values of another type. Leave typed columns and views to the
database administrator instead, and document how to set them up.

Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com>

Dockerfile

@@ -70,8 +70,6 @@ ENV PEO_DEFAULT_GRAPH=neo4j \
     PEO_BOLT_PORT=7687 \
     PEO_PG_HOST=127.0.0.1 \
     PEO_PG_PORT=5432 \
-    PEO_PROPERTY_COLUMNS=true \
-    PEO_PROPERTY_COLUMNS_INTERVAL=5 \
     PEO_PGADMIN=true \
     PEO_PGADMIN_PORT=5050 \
     CONFIG_DISTRO_FILE_PATH=/opt/peo/pgadmin/config_distro.py