Transfer batch accumulator when rolling to new segment

[numinnex]

No description provided.

[coveralls]

Pull Request Test Coverage Report for Build 11824637101

Details

• 45 of 51 (88.24%) changed or added relevant lines in 16 files are covered.
• No unchanged relevant lines lost coverage.
• Overall first build on fix_accumulator_for_new_segment at 75.127%

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Changes Missing Coverage	Covered Lines	Changed/Added Lines	%
server/src/channels/commands/maintain_messages.rs	0	1	0.0%
server/src/channels/commands/save_messages.rs	5	6	83.33%
server/src/compat/storage_conversion/persistency/partitions.rs	0	1	0.0%
server/src/streaming/partitions/messages.rs	2	5	40.0%

Totals
Change from base Build 11768736752:	75.1%
Covered Lines:	23128
Relevant Lines:	30785

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💛 - Coveralls