Update FAST data foundation integration

fast/stages/03-data-platform/dev/README.md

@@ -50,6 +50,19 @@ Cloud KMS crypto keys can be configured wither from the [FAST security stage](..
 
 To configure the use of Cloud KMS on resources, you have to specify the key id on the `service_encryption_keys` variable. Key locations should match resource locations.
 
+## Data Catalog
+
+[Data Catalog](https://cloud.google.com/data-catalog) helps you to document your data entry at scale. Data Catalog relies on [tags](https://cloud.google.com/data-catalog/docs/tags-and-tag-templates#tags) and [tag template](https://cloud.google.com/data-catalog/docs/tags-and-tag-templates#tag-templates) to manage metadata for all data entries in a unified and centralized service. To implement [column-level security](https://cloud.google.com/bigquery/docs/column-level-security-intro) on BigQuery, we suggest to use `Tags` and `Tag templates`.
+
+The default configuration will implement 3 tags:
+ - `3_Confidential`: policy tag for columns that include very sensitive information, such as credit card numbers.
+ - `2_Private`: policy tag for columns that include sensitive personal identifiable information (PII) information, such as a person's first name.
+ - `1_Sensitive`: policy tag for columns that include data that cannot be made public, such as the credit limit.
+
+Anything that is not tagged is available to all users who have access to the data warehouse.
+
+You can configure your tags and roles associated by configuring the `data_catalog_tags` variable. We suggest useing the "[Best practices for using policy tags in BigQuery](https://cloud.google.com/bigquery/docs/best-practices-policy-tags)" article as a guide to designing your tags structure and access pattern. By default, no groups has access to tagged data. 
+
 ### VPC-SC
 
 As is often the case in real-world configurations, [VPC-SC](https://cloud.google.com/vpc-service-controls) is needed to mitigate data exfiltration. VPC-SC can be configured from the [FAST security stage](../../02-security). This step is optional, but highly recomended, and depends on customer policies and security best practices.

fast/stages/03-data-platform/dev/main.tf

@@ -21,6 +21,7 @@ module "data-platform" {
   billing_account_id = var.billing_account.id
   composer_config    = var.composer_config
   data_force_destroy = var.data_force_destroy
+  data_catalog_tags  = var.data_catalog_tags
   folder_id          = var.folder_ids.data-platform
   groups             = var.groups
   network_config = {

fast/stages/03-data-platform/dev/variables.tf

@@ -36,6 +36,17 @@ variable "composer_config" {
   }
 }
 
+variable "data_catalog_tags" {
+  description = "List of Data Catalog Policy tags to be created with optional IAM binging configuration in {tag => {ROLE => [MEMBERS]}} format."
+  type        = map(map(list(string)))
+  nullable    = false
+  default = {
+    "3_Confidential" = null
+    "2_Private"      = null
+    "1_Sensitive"    = null
+  }
+}
+
 variable "data_force_destroy" {
   description = "Flag to set 'force_destroy' on data services like BigQery or Cloud Storage."
   type        = bool