feat: add internal ZCLAW kernel crates to git tracking

crates/zclaw-memory/src/lib.rs

@@ -0,0 +1,11 @@
+//! ZCLAW Memory Substrate
+//!
+//! SQLite-backed storage for agents, sessions, and memory.
+
+mod store;
+mod session;
+mod schema;
+
+pub use store::*;
+pub use session::*;
+pub use schema::*;