[SPARK-54423][SS] Introducing OffsetMap to enable Named Streaming Sources #53123
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ericm-db
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HyukjinKwon
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What changes were proposed in this pull request?
Introducing the OffsetMap format to key source progress by source name, as opposed to ordinal in the logical plan
Why are the changes needed?
These changes are needed in order to enable source evolution on a streaming query (adding, removing, reordering sources) without requiring the user to set a new checkpoint directory
Does this PR introduce any user-facing change?
No
How was this patch tested?
Unit tests
Was this patch authored or co-authored using generative AI tooling?
No