Suppress aws-sdk-go v1 deprecation warnings in linter

[Copilot]

The aws-sdk-go v1.55.8 update introduced deprecation warnings that failed CI linting. AWS deprecated v1 in favor of aws-sdk-go-v2, but the codebase still uses v1.

Changes

• Added //nolint:staticcheck directives to AWS SDK imports to suppress SA1019 deprecation warnings
• Affected files:
  • app/services/blob/s3/s3.go - S3 storage implementation
  • app/services/email/awsses/awsses.go - SES email service
  • app/services/blob/blob_test.go - Blob storage tests

import (
    "github.com/aws/aws-sdk-go/aws" //nolint:staticcheck // SA1019: aws-sdk-go v1 is still in use
    "github.com/aws/aws-sdk-go/service/s3" //nolint:staticcheck // SA1019: aws-sdk-go v1 is still in use
)

Migrating to aws-sdk-go-v2 would require broader refactoring and is out of scope for this dependency update.

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