Fix: Resolve password hash corruption in Authelia users_database.yml

Critical fix for argon2 password hash preservation:
- Root cause: Bash variable expansion of $ characters in argon2id hashes
- Solution: Write hash directly from Docker output to file, bypass bash variables entirely
- setup-homelab.sh: Stream Docker output directly to /tmp/authelia_password_hash.tmp
- deploy-homelab.sh: Read hash file in Python to avoid any bash expansion
- Result: Password hash correctly preserved with full $argon2id$v=19$m=... format

Other changes:
- Added DOCKER_API_VERSION=1.44 env var for watchtower (API compatibility)
- Watchtower still has issues with Docker 29.1.4 - keeping version pinned for investigation

Tested on Debian 12 with Docker 29.1.4:
✅ All 11 critical containers healthy
✅ Authelia authentication working correctly
✅ Password hash preserved through entire deployment workflow
⚠️  Watchtower restart loop (non-critical, under investigation)

docker-compose/infrastructure.yml

@@ -67,9 +67,9 @@ services:
       - "traefik.http.services.pihole.loadbalancer.server.port=80"
 
   # Watchtower - Automatic container updates
-  # Runs silently in background, no UI
+  # Runs silently in background, no UI  
   watchtower:
-    image: containrrr/watchtower:1.7.1
+    image: containrrr/watchtower:1.7.2
     container_name: watchtower
     restart: unless-stopped
     networks:
@@ -77,6 +77,7 @@ services:
     volumes:
       - /var/run/docker.sock:/var/run/docker.sock
     environment:
+      - DOCKER_API_VERSION=1.44
       - WATCHTOWER_CLEANUP=true
       - WATCHTOWER_INCLUDE_RESTARTING=true
       - WATCHTOWER_SCHEDULE=0 0 4 * * *  # 4 AM daily