fix: init-cluster workflow authentication and docker-compose setup

[joshrotenberg]

Problem

The init-cluster workflow was failing because it required authentication for the bootstrap API, which doesn't need auth initially. Also, docker-compose wasn't building from local code for testing.

Solution

1. Modified init-cluster workflow to create an unauthenticated client for bootstrap operations
2. Changed docker-compose.yml to build from local Dockerfile for easier testing
3. Added ARM64 Redis Enterprise image requirement to CLAUDE.md

Changes

• Updated init_cluster.rs to use unauthenticated client for bootstrap
• Modified docker-compose.yml to build from local code
• Added ARM64 image requirements to CLAUDE.md documentation

Testing

# Set required env vars for ARM64 systems
export REDIS_ENTERPRISE_IMAGE=kurtfm/rs-arm:latest
export REDIS_ENTERPRISE_PLATFORM=linux/arm64

# Start containers (builds from local code)
docker compose up -d

# Cluster initializes automatically via workflow
docker logs redis-enterprise-init

# Verify cluster is initialized
export REDIS_ENTERPRISE_URL="https://localhost:9443"
export REDIS_ENTERPRISE_USER="admin@redis.local"
export REDIS_ENTERPRISE_PASSWORD="Redis123!"
export REDIS_ENTERPRISE_INSECURE="true"
cargo run -- api enterprise get /v1/cluster

Verified Working

✅ Bootstrap workflow successfully initializes cluster without authentication
✅ Creates admin user and default database
✅ Cluster accessible with created credentials