Process write checkpoints on keepalive. #1441

Job	Run time
Core Test	1m 37s
Build and Test PowerSync Service	1m 29s
MySQL Test (5.7)	1m 49s
MySQL Test (8)	1m 59s
MySQL Test (8.4)	1m 53s
Postgres Test (11)	6m 58s
Postgres Test (14)	6m 59s
Postgres Test (12)	6m 50s
Postgres Test (13)	7m 0s
Postgres Test (16)	6m 50s
Postgres Test (17)	6m 51s
MongoDB Test (6.0)	2m 11s
MongoDB Test (7.0)	2m 7s
MongoDB Test (8.0)	2m 3s
Postgres Test (15)	6m 51s
Build and Test PowerSync Service	1m 29s
MongoDB Test (8.0)	2m 1s
MongoDB Test (7.0)	2m 11s
Postgres Test (13)	7m 0s
MySQL Test (8)	1m 59s
Postgres Test (11)	6m 58s
MySQL Test (8.4)	1m 53s
MongoDB Test (6.0)	2m 11s
Postgres Test (15)	6m 51s
Postgres Test (14)	6m 59s
MySQL Test (5.7)	1m 49s
Postgres Test (12)	6m 50s
Postgres Test (17)	6m 51s
Postgres Test (16)	6m 50s
Core Test	1m 37s
Core Test	1m 37s
MongoDB Test (8.0)	2m 13s
Postgres Test (13)	7m 0s
Build and Test PowerSync Service	1m 29s
MongoDB Test (7.0)	2m 11s
Postgres Test (11)	6m 58s
Postgres Test (12)	6m 50s
MySQL Test (8.4)	1m 53s
MySQL Test (8)	1m 59s
MongoDB Test (6.0)	2m 11s
MySQL Test (5.7)	1m 49s
Postgres Test (15)	6m 51s
Postgres Test (16)	6m 50s
Postgres Test (14)	6m 59s
Postgres Test (17)	6m 51s
Core Test	1m 37s
MongoDB Test (8.0)	2m 12s
MySQL Test (8)	1m 59s
Postgres Test (11)	6m 58s
MongoDB Test (7.0)	2m 11s
MongoDB Test (6.0)	2m 11s
MySQL Test (8.4)	1m 53s
Postgres Test (12)	6m 50s
Postgres Test (14)	6m 59s
Postgres Test (15)	6m 51s
MySQL Test (5.7)	1m 49s
Postgres Test (13)	7m 0s
Postgres Test (16)	6m 50s
Postgres Test (17)	6m 51s
Build and Test PowerSync Service	1m 29s
	4h 14m 17s

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