feat(ibm-mq-metrics): report queue manager uptime (#2823)#2835

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harshitt13:feat/ibm-mq-uptime-2823

Commits on May 14, 2026

feat(ibm-mq-metrics): report queue manager uptime (#2823)
harshitt13
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test(ibm-mq-metrics): add comprehensive uptime and timezone tests
harshitt13
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Commits on May 15, 2026

refactor(ibm-mq-metrics): replace deprecated heartbeat gauge with uptime counter and update related metrics
harshitt13
committed