Add connection timeout, TCP keepalive, and pool health features (#283) #630

Job	Run time
Run integration tests (4.4)	4m 57s
Validate minimal dependency versions	1m 10s
Run unit tests (windows-latest)	4m 10s
Run unit tests (macOS-latest)	1m 44s
Run integration tests (5)	6m 11s
Run unit tests (ubuntu-latest)	1m 43s
Run integration tests (2025)	5m 15s
Check formatting	10s
Check clippy	57s
Release	0s
	26m 17s

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