D-replace per #14: rip out PREREQ + RESHAPE_STEPS + applyDecoratorMigrations
and replace with declarative DecoratorSchema (entity columns + indexes +
sidecar tables). SchemaBuilder<Decorators...>::create composes the stack
into a single CREATE TABLE per entity table; SchemaContract::verify
introspects-and-asserts at runtime so code can never run against an
under-migrated DB. Atlas (atlasgo.io) becomes the authority for schema
evolution between deploys — decorator code never runs ALTER at runtime.
- TemporalRepository contributes valid_from/valid_until + UNIQUE composite index
- AuditLogRepository contributes the audit_log sidecar table
- ScopeGuardRepository declares empty contributions for clean stacking
- 8 new tests in test_schema_contract.cpp covering compose / dedup / verify
- README updated; bumped 0.8.0 → 0.9.0
fewo-webapp does not yet call applyDecoratorMigrations, so this is a
clean cut — no consumer-side breakage. PRs 1-4 (role_templates,
user_property_permissions, user_group_permissions, users) follow.
Co-Authored-By: Claude Opus 4.7 (1M context) <noreply@anthropic.com>
