release: 0.2.7

fix: wrap instance_spaces in dict for Json() DMS property

DMS `Json()` properties expect a JSON object (dict), not an array.
Storing as `{"spaces": [...]}` fixes the 400 error without requiring
a schema migration.

## Bump

- [x] Patch
- [ ] Minor
- [ ] Major

## Changelog

### Fixed

- `ViewConfigState` upsert now stores `instance_spaces` as `{"spaces": [...]}` to satisfy the DMS `Json()` property constraint (plain Python lists caused a 400 error).
