Replace Azure Cache for Redis with Azure Managed Redis

[Copilot]

Azure Cache for Redis (Microsoft.Cache/redis) is deprecated. This replaces it with Azure Managed Redis (Microsoft.Cache/redisEnterprise) across infrastructure, metadata, and docs.

Infrastructure (infra/resources.bicep)

• Redis cluster: Microsoft.Cache/redis (Basic C0) → Microsoft.Cache/redisEnterprise (Balanced_B0, capacity 1) with publicNetworkAccess: 'Disabled'
• Redis database: New explicit Microsoft.Cache/redisEnterprise/databases sub-resource (default, port 10000, AllKeysLRU eviction)
• Clustering policy: EnterpriseCluster — presents a single endpoint so standard Redis clients (django-redis/redis-py) work without modification
• Private endpoint: groupIds redisCache → redisEnterprise
• Private DNS zone: privatelink.redis.cache.windows.net → privatelink.redisenterprise.cache.azure.net
• Service Connector target: resourceId('Microsoft.Cache/Redis/Databases', ..., '0') → redisCacheDb.id

resource redisCache 'Microsoft.Cache/redisEnterprise@2024-10-01' = {
  sku: { name: 'Balanced_B0', capacity: 1 }
  properties: { minimumTlsVersion: '1.2', publicNetworkAccess: 'Disabled' }
}
resource redisCacheDb 'Microsoft.Cache/redisEnterprise/databases@2024-10-01' = {
  parent: redisCache
  name: 'default'
  properties: { evictionPolicy: 'AllKeysLRU', clusteringPolicy: 'EnterpriseCluster', port: 10000 }
}

App config (azureproject/production.py)

No changes — the Service Connector for Azure Managed Redis emits the same AZURE_REDIS_CONNECTIONSTRING app setting.

Metadata & docs

• azure.yaml + .devcontainer/devcontainer.json: template name updated to python-app-service-postgresql-managed-redis-infra
• README.md: "Azure Redis Cache" → "Azure Managed Redis"