Fix batch_accumulator bug when rolling to new segment

[numinnex]

No description provided.

[coveralls]

Pull Request Test Coverage Report for Build 11654303199

Details

• 65 of 70 (92.86%) changed or added relevant lines in 18 files are covered.
• 36 unchanged lines in 6 files lost coverage.
• Overall coverage decreased (-0.006%) to 75.129%

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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/compat/storage_conversion/persistency/partitions.rs	0	1	0.0%
server/src/streaming/partitions/messages.rs	13	16	81.25%

Files with Coverage Reduction	New Missed Lines	%
server/src/streaming/systems/messages.rs	1	69.7%
sdk/src/http/client.rs	1	73.63%
server/src/configs/config_provider.rs	1	84.54%
server/src/streaming/systems/users.rs	1	88.15%
server/src/streaming/batching/batch_accumulator.rs	14	69.51%
server/src/streaming/segments/messages.rs	18	70.0%

Totals
Change from base Build 11653741388:	-0.006%
Covered Lines:	23072
Relevant Lines:	30710

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💛 - Coveralls