refactor(workspace): enforce layered crate boundaries

crates/aether-data/runtime/src/repository/candidates/mod.rs

@@ -0,0 +1,18 @@
+mod memory;
+
+#[allow(unused_imports)]
+pub(crate) use aether_data_contracts::repository::candidates::{
+    build_decision_trace, derive_request_candidate_final_status,
+    request_candidate_lifecycle_would_regress, DecisionTrace, DecisionTraceCandidate,
+    PublicHealthStatusCount, PublicHealthTimelineBucket, RequestCandidateFinalStatus,
+    RequestCandidateReadRepository, RequestCandidateRepository, RequestCandidateStatus,
+    RequestCandidateTrace, RequestCandidateWriteRepository, StoredRequestCandidate,
+    UpsertRequestCandidateRecord,
+};
+#[cfg(feature = "mysql")]
+pub use aether_data_mysql::MysqlRequestCandidateRepository;
+#[cfg(feature = "postgres")]
+pub use aether_data_postgres::SqlxRequestCandidateReadRepository;
+#[cfg(feature = "sqlite")]
+pub use aether_data_sqlite::SqliteRequestCandidateRepository;
+pub use memory::InMemoryRequestCandidateRepository;