fix: update ExcludeCharacters in elasticache.yaml for password generation

[guimoreirar]

• Added '{' and '}' to the ExcludeCharacters list in the GenerateSecretString section to enhance security for generated passwords.

[coderabbitai]

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Reviewing files that changed from the base of the PR and between 5502d4e and 6a7ab00.

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• templates/elasticache.yaml

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Walkthrough

The ElastiCache authentication token secret configuration in templates/elasticache.yaml was updated to exclude an additional set of characters when generating the secret. Specifically, the ExcludeCharacters parameter in the GenerateSecretString configuration was modified to add curly braces ({}) to the list of disallowed characters. This changes the character set available for CloudFormation's automatic 64-character secret generation used by the ElastiCache replication group's auth token.

🚥 Pre-merge checks | ✅ 2

✅ Passed checks (2 passed)

Check name	Status	Explanation
Title check	✅ Passed	The title accurately describes the main change: updating ExcludeCharacters in elasticache.yaml for password generation, which aligns with the changeset.
Description check	✅ Passed	The description is directly related to the changeset, specifying that curly braces were added to ExcludeCharacters for security enhancement.

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[lerian-studio]

Consider updating CHANGELOG.md to document this change. If this change doesn't need a changelog entry, add the skip-changelog label.