domain: add Storage ports (BYOS, Quota, LibraryPath) and QuotaChecker service

crates/domain/src/ports/ingest_session_repo.rs

@@ -0,0 +1,9 @@
+use async_trait::async_trait;
+use crate::{entities::IngestSession, errors::DomainError, value_objects::SystemId};
+
+#[async_trait]
+pub trait IngestSessionRepository: Send + Sync {
+    async fn find_by_id(&self, id: &SystemId) -> Result<Option<IngestSession>, DomainError>;
+    async fn find_by_user(&self, user_id: &SystemId) -> Result<Vec<IngestSession>, DomainError>;
+    async fn save(&self, session: &IngestSession) -> Result<(), DomainError>;
+}