feat: add scraper service to all Docker environments

Add eamco_scraper container definitions for dev, local, prod, and
Unraid deployments on port 9519. Remove unused Authorize env_file
references from dev config. Include add_towns.sh helper script for
bootstrapping street reference data.

Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>

docker-compose.prod.yml

@@ -120,3 +120,17 @@ services:
       - POSTGRES_DBNAME=${POSTGRES_DBNAME}
     ports:
       - '9518:8000'
+
+  scraper_prod:
+    restart: on-failure
+    build:
+      context: ../eamco_scraper
+      dockerfile: Dockerfile.prod
+    environment:
+      - MODE=PRODUCTION
+      - POSTGRES_USERNAME=${POSTGRES_USERNAME}
+      - POSTGRES_PW=${POSTGRES_PW}
+      - POSTGRES_SERVER=${POSTGRES_SERVER}
+      - POSTGRES_DBNAME=${POSTGRES_DBNAME}
+    ports:
+      - '9519:8000'