feat(enterprise): add comprehensive license management commands (#304)

[joshrotenberg]

Description

Implements comprehensive license management commands for Redis Enterprise, with a special focus on solving the pain point of managing licenses across multiple Redis Enterprise instances. This PR addresses issue #304.

🎯 Key Problem Solved

Managing licenses across multiple Redis Enterprise deployments is a major pain point. Our profile-based architecture makes this trivial:

• Audit all instances with a single command
• Bulk update licenses across deployments
• Generate compliance reports for all instances
• Monitor expiration across your entire fleet

Core Features

Single-Instance License Commands

• Get license - View current license information
• Update license - Apply new license via JSON
• Upload license - Direct file upload support
• Validate license - Pre-validate before applying
• Check expiry - Monitor days until expiration
• View features - List licensed capabilities
• Usage report - Current usage vs limits

🚀 Multi-Instance Workflow Commands

These are the game-changers for enterprise users:

License Audit

# Check all configured instances at once
redisctl enterprise workflow license audit

# Focus on problems
redisctl enterprise workflow license audit --expiring
redisctl enterprise workflow license audit --expired

Bulk License Updates

# Update all production instances with one command
redisctl enterprise workflow license bulk-update \
  --profiles "prod-east,prod-west,prod-central" \
  --data @new-license.json

# Safe mode with dry-run
redisctl enterprise workflow license bulk-update \
  --profiles all \
  --data @new-license.json \
  --dry-run

Compliance Reporting

# Generate CSV for management
redisctl enterprise workflow license report --format csv > compliance.csv

# JSON for automation
redisctl enterprise workflow license report -o json

Automated Monitoring

# CI/CD integration
redisctl enterprise workflow license monitor --fail-on-warning

# Custom thresholds
redisctl enterprise workflow license monitor --warning-days 60

Implementation Details

Architecture

• Core license commands in license.rs
• Workflow commands in license_workflow.rs
• Leverages existing profile system for multi-instance management
• Full async support for parallel operations

Profile-Based Management

# Setup profiles for all instances
redisctl profile set prod-east --url https://redis-east.company.com:9443 ...
redisctl profile set prod-west --url https://redis-west.company.com:9443 ...
redisctl profile set staging --url https://redis-staging.company.com:9443 ...

# Now manage all with workflow commands
redisctl enterprise workflow license audit

Testing

All commands tested against local Docker instance:

• ✅ Core license operations
• ✅ Multi-profile audit
• ✅ Bulk update with dry-run
• ✅ Report generation
• ✅ Monitoring with thresholds

Documentation

Comprehensive documentation added with:

• All command examples
• Multi-instance management patterns
• Automation scripts
• CI/CD integration examples
• Troubleshooting guide

Use Cases

Scenario 1: Enterprise with 10 Redis Instances

Before: Manually check each instance, update licenses one by one
After: redisctl enterprise workflow license audit - see everything at once

Scenario 2: License Renewal

Before: SSH to each server, apply license individually
After: redisctl enterprise workflow license bulk-update --profiles all --data @license.json

Scenario 3: Compliance Reporting

Before: Manual spreadsheet maintenance
After: redisctl enterprise workflow license report --format csv - automated monthly reports

Scenario 4: CI/CD License Validation

- name: Check Redis Licenses
  run: |
    redisctl enterprise workflow license monitor \
      --warning-days 30 \
      --fail-on-warning

Breaking Changes

None - all new functionality

Notes

• This implementation specifically addresses the multi-instance license management pain point
• Workflow commands operate on all configured enterprise profiles
• CSV export enables easy integration with existing compliance tools
• Exit codes enable CI/CD integration

Closes #304

cc @joshrotenberg - This PR specifically addresses the license management pain point you mentioned. The workflow commands make it trivial to manage licenses across multiple instances.