feat: throwaway netbox deployment for end-to-end testing

compose stack modelled on the production netbox deployment (same pinned
images, worker, healthchecks) minus traefik: the API is served straight
on localhost and nothing survives an e2e-down.

e2e/docker-compose.yml

@@ -0,0 +1,105 @@
+# SPDX-License-Identifier: GPL-2.0-or-later
+# Copyright (C) 2026 Bryan Joshua Pedini
+---
+services:
+  netbox: &netbox
+    image: netboxcommunity/netbox:${NETBOX_VERSION}-${NETBOX_DOCKER_VERSION}
+    depends_on:
+      postgres:
+        condition: service_healthy
+      redis:
+        condition: service_healthy
+      redis-cache:
+        condition: service_healthy
+    environment:
+      - API_TOKEN_PEPPER_1=${NETBOX_API_TOKEN_PEPPER_1}
+      - DB_HOST=postgres
+      - DB_NAME=${PSQL_NAME}
+      - DB_USER=${PSQL_USER}
+      - DB_PASSWORD=${PSQL_PASS}
+      - REDIS_HOST=redis
+      - REDIS_DATABASE=0
+      - REDIS_PASSWORD=${REDIS_PASS}
+      - REDIS_SSL=false
+      - REDIS_CACHE_HOST=redis-cache
+      - REDIS_CACHE_DATABASE=1
+      - REDIS_CACHE_PASSWORD=${REDIS_CACHE_PASS}
+      - REDIS_CACHE_SSL=false
+      - SECRET_KEY=${NETBOX_SECRET_KEY}
+      - SKIP_SUPERUSER=false
+      - SUPERUSER_NAME=${NETBOX_SUPERUSER_NAME}
+      - SUPERUSER_EMAIL=${NETBOX_SUPERUSER_EMAIL}
+      - SUPERUSER_PASSWORD=${NETBOX_SUPERUSER_PASS}
+    healthcheck:
+      test: curl -f http://localhost:8080/login/ || exit 1
+      # first boot runs every migration, give it plenty of headroom
+      start_period: 600s
+      timeout: 3s
+      interval: 15s
+    ports:
+      - "127.0.0.1:${NETBOX_HTTP_PORT}:8080"
+    networks:
+      - internal
+
+  netbox-worker:
+    <<: *netbox
+    command:
+      - /opt/netbox/venv/bin/python
+      - /opt/netbox/netbox/manage.py
+      - rqworker
+    depends_on:
+      netbox:
+        condition: service_healthy
+    healthcheck:
+      test: ps -aux | grep -v grep | grep -q rqworker || exit 1
+      start_period: 20s
+      timeout: 3s
+      interval: 15s
+    ports: []
+
+  postgres:
+    image: postgres:${PSQL_VERSION}
+    environment:
+      - POSTGRES_DB=${PSQL_NAME}
+      - POSTGRES_USER=${PSQL_USER}
+      - POSTGRES_PASSWORD=${PSQL_PASS}
+    healthcheck:
+      test: pg_isready -q -t 2 -d $$POSTGRES_DB -U $$POSTGRES_USER
+      start_period: 20s
+      timeout: 30s
+      interval: 10s
+      retries: 5
+    networks:
+      - internal
+
+  redis:
+    image: redis:${REDIS_VERSION}
+    command:
+      - sh
+      - -c
+      - redis-server --appendonly yes --requirepass $$REDIS_PASSWORD
+    environment:
+      - REDIS_PASSWORD=${REDIS_PASS}
+    healthcheck: &redis-healthcheck
+      test: '[ $$(redis-cli --pass "$${REDIS_PASSWORD}" ping) = ''PONG'' ]'
+      start_period: 5s
+      timeout: 3s
+      interval: 1s
+      retries: 5
+    networks:
+      - internal
+
+  redis-cache:
+    image: redis:${REDIS_VERSION}
+    command:
+      - sh
+      - -c
+      - redis-server --requirepass $$REDIS_PASSWORD
+    environment:
+      - REDIS_PASSWORD=${REDIS_CACHE_PASS}
+    healthcheck: *redis-healthcheck
+    networks:
+      - internal
+
+networks:
+  internal: