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persist: event schema evolution via upcasters + 9 tests
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upcast.sx: register a pure (event -> event) upcaster per type in an immutable
registry; read-upcast/project-upcast lift legacy events to the current shape on
read so projections see one shape (no version branching, no history rewrite).
upcast-data helper merges new :data fields. 171/171.

Co-Authored-By: Claude Opus 4.8 (1M context) <noreply@anthropic.com>
This commit is contained in:
giles
2026-06-06 19:26:35 +00:00
parent 62a1485302
commit 0f6dbdfc7d
6 changed files with 178 additions and 5 deletions
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lib/persist/scoreboard.md
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@@ -19,5 +19,6 @@ _Generated by `lib/persist/conformance.sh`_
| catalog | 10 | 0 | 10 |
| query | 9 | 0 | 9 |
| batch | 10 | 0 | 10 |
| upcast | 9 | 0 | 9 |
| recovery | 6 | 0 | 6 |
| **Total** | **162** | **0** | **162** |
| **Total** | **171** | **0** | **171** |