Change records "proxied" default

[glensc]

Describe the Feature

  proxied  = lookup(each.value, "proxied", false)

• https://github.com/cloudposse/terraform-cloudflare-zone/blob/3073cc39498d44ec44f023ffe1ec8d03d664ebf7/main.tf#L42

I would like to change proxied to true by default, as most of the records are proxied.

Expected Behavior

Maybe introduce a new variable: local.records_proxied_default?

Use Case

Reduce duplication.