cockroachdb / cockroachdb/cockroach
DB-Level Changefeed: Migrate existing multi-table feeds from single to per-table PTS format when flag is enabled
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A-cdc
branch-release-25.4
C-enhancement
T-cdc
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Description
In order to support turning per-table PTS on and off, we need to be able to convert existing feeds and their PTS to the new per-table format. Add behavior to modify this on feed start if the flag (cluster setting) is enabled.
Epic: [CRDB-1421](https://cockroachlabs.atlassian.net/browse/CRDB-1421)
Jira issue: CRDB-51240
Epic CRDB-1421
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