feat: add CloudWatch LogGroup with retention policy to Lambda functions#117
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feat: add CloudWatch LogGroup with retention policy to Lambda functions#117
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Add explicit CDK-managed LogGroups with 1-week retention to all Lambda functions (Webapp Handler, MigrationRunner, AsyncJob Handler). Without this, Lambda auto-creates LogGroups with infinite retention, causing unbounded log storage costs. Lambda@Edge (SignPayload) is excluded since edge-region LogGroups cannot be managed by CDK and will be addressed separately (#66). Closes #103
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Summary
Add explicit CDK-managed CloudWatch LogGroups with 1-week retention to all Lambda functions to prevent unbounded log storage costs.
Problem
Without explicit LogGroup configuration, Lambda auto-creates LogGroups with infinite retention. As logs accumulate, storage costs grow without bound.
Changes
Added
LogGroupwithRetentionDays.ONE_WEEKandRemovalPolicy.DESTROYto:cdk/lib/constructs/webapp.tscdk/lib/constructs/webapp.tscdk/lib/constructs/async-job.tsCDK test snapshots updated accordingly.
Out of scope
Lambda@Edge (SignPayload) is excluded — edge-region LogGroups cannot be managed by CDK and will become unnecessary after #66.
Closes #103