Fix deadlock issue in CleanMessagesExecutor

[hubcio]

This commit resolves a deadlock by acquiring a write lock on the system
once instead of multiple times within the CleanMessagesExecutor. The
redundant system.write() calls have been removed, ensuring that the
metrics are updated without the need for additional locks.

This closes #897.

[coveralls]

Pull Request Test Coverage Report for Build 8661543493

Details

• 2 of 2 (100.0%) changed or added relevant lines in 1 file are covered.
• 2 unchanged lines in 2 files lost coverage.
• Overall coverage increased (+0.02%) to 82.585%

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Files with Coverage Reduction	New Missed Lines	%
sdk/src/clients/client.rs	1	49.74%
server/src/streaming/segments/storage.rs	1	49.91%

Totals
Change from base Build 8658041641:	0.02%
Covered Lines:	22521
Relevant Lines:	27270

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💛 - Coveralls