feat: expose security group ID for Aurora Postgres cluster

[milldr]

what

• Add security_group_id output to expose the security group ID from the underlying RDS cluster module

why

• This enables proper configuration of inbound and outbound traffic rules for ECS services

references

.

Summary by CodeRabbit

• New Features
  • Added a new Terraform output that exposes the security group ID of the Aurora Postgres cluster. This makes it easier to reference the cluster’s security group in downstream configurations (e.g., networking rules or integrations). No changes to existing outputs or behavior.

[coderabbitai]

Walkthrough

Adds a Terraform output named security_group_id in src/outputs.tf, exposing module.aurora_postgres_cluster.security_group_id with a description. Placed after existing outputs; no other files or logic modified.

Changes

Cohort / File(s)	Summary of Changes
Terraform outputs src/outputs.tf	Added output security_group_id mapping to module.aurora_postgres_cluster.security_group_id with description "The security group ID of the Aurora Postgres cluster".

Estimated code review effort

🎯 1 (Trivial) | ⏱️ ~3 minutes

Poem

A hop, a bop, a tiny tweak—
I nudge an output, quick and sleek.
Security group, now clear to see,
Aurora’s gate, in plain ID.
Thump-thump! my paws approve this run—
Small change shipped, and swiftly done. 🐇✨

✨ Finishing Touches

🧪 Generate unit tests

• Create PR with unit tests
• Post copyable unit tests in a comment
• Commit unit tests in branch feature/expose-security-group-id

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[coderabbitai]

Actionable comments posted: 0

🧹 Nitpick comments (1)

src/outputs.tf (1)

73-73: Consistency nit: end description with a period.

Matches nearby allowed_security_groups description style.

Apply this minimal change:

-  description = "The security group ID of the Aurora Postgres cluster"
+  description = "The security group ID of the Aurora Postgres cluster."

📜 Review details

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Review profile: CHILL

Plan: Pro

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📥 Commits

Reviewing files that changed from the base of the PR and between 7b9435d and 61a32e5.

📒 Files selected for processing (1)

• src/outputs.tf (1 hunks)

🔇 Additional comments (1)

src/outputs.tf (1)

71-74: Confirm remote module exports security_group_id: The module cloudposse/rds-cluster/aws v2.1.1 (referenced in src/cluster-regional.tf) must expose an output named security_group_id, or the plan will fail. Also verify this output is populated both when you supply an existing SG and when the module creates one.

[milldr]

/terratest

[github-actions]

These changes were released in v1.539.0.