Update engine version in serverless.yaml

[goruha]

what

• Update engine version in serverless.yaml

why

• 13.15 is EOL on AWS

references

• https://linear.app/cloudposse/issue/DEV-3640/decommission-aurora-postgresql-cluster-in-sandbox-aws-799847381734-us

Summary by CodeRabbit

• Chores

  • Updated default Aurora PostgreSQL engine versions in configuration templates: provisioned to 15.13 and serverless to 13.21.
  • Aligns templates with supported releases for improved compatibility and security; no behavioral or logic changes.

• Tests

  • Updated test fixtures to reflect the new engine versions.

[coderabbitai]

Walkthrough

Bumped Postgres engine_version values in two YAML test fixtures: test/fixtures/stacks/catalog/usecase/basic.yaml (15.3 → 15.13) and test/fixtures/stacks/catalog/usecase/serverless.yaml (13.15 → 13.21). No other changes.

Changes

Cohort / File(s)	Summary of Changes
Test fixtures: engine_version bumps test/fixtures/stacks/catalog/usecase/basic.yaml, test/fixtures/stacks/catalog/usecase/serverless.yaml	Updated Postgres engine_version strings in YAML fixtures: basic.yaml 15.3 → 15.13; serverless.yaml 13.15 → 13.21. No other edits.

Estimated code review effort

🎯 2 (Simple) | ⏱️ ~10 minutes

Poem

I nudged the dials, soft hops in tune,
Numbers climbed under a YAML moon.
Fifteen point thirteen, thirteen point twenty-one,
Tiny hops done—now off to run. 🐇✨

Pre-merge checks and finishing touches

✅ Passed checks (3 passed)

Check name	Status	Explanation
Description Check	✅ Passed	Check skipped - CodeRabbit’s high-level summary is enabled.
Title Check	✅ Passed	The title correctly refers to the bump in serverless.yaml but omits the related engine version update in basic.yaml, so it only partially represents the full set of changes.
Docstring Coverage	✅ Passed	No functions found in the changes. Docstring coverage check skipped.

✨ Finishing touches

🧪 Generate unit tests (beta)

• Create PR with unit tests
• Post copyable unit tests in a comment
• Commit unit tests in branch update-rds-postgresql-13.22

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📜 Recent review details

Configuration used: CodeRabbit UI

Review profile: CHILL

Plan: Pro

📥 Commits

Reviewing files that changed from the base of the PR and between 840c705 and b92417c.

📒 Files selected for processing (1)

• test/fixtures/stacks/catalog/usecase/basic.yaml (1 hunks)

🚧 Files skipped from review as they are similar to previous changes (1)

• test/fixtures/stacks/catalog/usecase/basic.yaml

⏰ Context from checks skipped due to timeout of 90000ms. You can increase the timeout in your CodeRabbit configuration to a maximum of 15 minutes (900000ms). (1)

• GitHub Check: Summary

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[goruha]

/terratest

[goruha]

/terratest

[goruha]

/terratest

[github-actions]

These changes were released in v1.540.1.