fix(helm): allow externalSecret as valid DATABASE_URL source in postgres validation

[o-pauloroberto]

Problem

When database.engine=postgresql and externalSecret.enabled=true, the chart fails at render time:

chart-deco-studio: defina database.url quando database.engine=postgresql ou use secret.secretName para fornecer DATABASE_URL via Secret

The validation only accepted database.url or secret.secretName as valid sources for DATABASE_URL, ignoring the case where the value comes from AWS Secrets Manager via ExternalSecret.

Fix

Added externalSecret.enabled as a third valid source. The check now passes when any of these is set:

• database.url
• secret.secretName
• externalSecret.enabled: true

Republishes chart 0.7.0 with the fix included.

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Summary by cubic

Fix Helm chart validation to accept externalSecret.enabled as a valid DATABASE_URL source when database.engine=postgresql, preventing render failures for ExternalSecret setups (e.g., AWS Secrets Manager). The chart now renders without requiring database.url or secret.secretName when ExternalSecret is used.

^{Written for commit 78d3783. Summary will update on new commits. Review in cubic}