feat(lumen-exchange): 420cloud competitor analysis + git-sync bidirectional mirror

- Scraped 420cloud.io: feature matrix, AGB pricing analysis, Club Map legal risk
- Strategic recommendations for Sprint 4: compliance PDF, PWA, QR ID, federation
- Research agenda for Work Lumen (Amazon Q deep dive)
- Add plans/git-sync/ Docker container for IONOS→TrueNAS bidirectional sync

plans/git-sync/docker-compose.yml

@@ -0,0 +1,26 @@
+services:
+  git-sync:
+    image: alpine/git:latest
+    container_name: git-sync
+    restart: unless-stopped
+    volumes:
+      - ./sync.sh:/sync.sh:ro
+      - git-sync-data:/tmp/git-sync
+    entrypoint: ["/bin/sh", "/sync.sh"]
+    environment:
+      # IONOS Gitea token (source of truth — Work Lumen pushes here)
+      IONOS_TOKEN: ${IONOS_TOKEN}
+      # TrueNAS Gitea token (homelab — pull target)
+      TRUENAS_TOKEN: ${TRUENAS_TOKEN}
+      TRUENAS_HOST: 192.168.188.119:30008
+      IONOS_HOST: git.plate-software.de
+      GITEA_USER: pplate
+      # Space-separated list of repos to sync IONOS → TrueNAS
+      REPOS: cannamanage
+      # Sync interval in seconds (300 = 5 minutes)
+      INTERVAL: "300"
+    extra_hosts:
+      - "host.docker.internal:host-gateway"
+
+volumes:
+  git-sync-data: