fix(microservice): prevent error logs during redis client shutdown

[janroker]

PR Checklist

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• The commit message follows our guidelines: https://github.com/nestjs/nest/blob/master/CONTRIBUTING.md
• Tests for the changes have been added (for bug fixes / features)
• Docs have been added / updated (for bug fixes / features)

PR Type

What kind of change does this PR introduce?

• Bugfix
• Feature
• Code style update (formatting, local variables)
• Refactoring (no functional changes, no api changes)
• Build related changes
• CI related changes
• Other... Please describe:

What is the current behavior?

Issue Number: N/A

When calling close() on ClientRedis, the isManuallyClosed flag is set after awaiting the quit() calls on the Redis clients. If Redis emits the 'end' event during or after quit(), event handlers may see isManuallyClosed as false and incorrectly log errors or attempt reconnection logic. This creates a race condition and can result in misleading error logs during a normal shutdown.

What is the new behavior?

The isManuallyClosed flag is now set to true before calling quit() on the Redis clients. This ensures that any event handlers triggered during shutdown will see the correct state and will not log errors or attempt reconnection when the shutdown is intentional.

Additional tests have been added to verify this behavior and prevent regressions.

Does this PR introduce a breaking change?

• Yes
• No

Other information

[coveralls]

Pull Request Test Coverage Report for Build 8ecb4057-9687-4b27-ab7b-85339b5058e7

Details

• 1 of 1 (100.0%) changed or added relevant line in 1 file are covered.
• No unchanged relevant lines lost coverage.
• Overall coverage remained the same at 88.94%

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Totals
Change from base Build 16a83cd7-0397-4555-852d-e8667ea8a43e:	0.0%
Covered Lines:	7197
Relevant Lines:	8092

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💛 - Coveralls

[kamilmysliwiec]

lgtm