[DX23876]

Summary

• recognize the unpublished v42 body-weight migration only when its exact legacy marker exists
• recognize the unpublished v43 energy-coverage migration only when its exact legacy marker exists
• preserve existing rows and record the released v43/v44 migration identifiers without masking unrelated schema collisions
• add a regression test that recreates the prototype database and verifies a data-preserving upgrade

Validation

• WhoopStore: 485 tests passed, 1 skipped
• prototype migration regression: passed
• concurrent fresh-file opens: 16/16 passed
• universal macOS build: passed
• generic iOS build including Watch and Widgets: passed
• i18n audit and git diff --check: passed

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