Feature/closeables weak ref#1443

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JerryShea wants to merge 3 commits intodevelopfrom

feature/closeables-weak-ref

Commits on Jan 27, 2024

make SCQ.closeables use WeakReference so that tailers/appenders references not leaked after they would otherwise be eligible for GC. Closes #1455
JerryShea
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try/finally scope for tailers & appenders in tests
JerryShea
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undo exception suppress
JerryShea
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