split into workspace: poc-memory and poc-daemon subcrates

poc-daemon (notification routing, idle timer, IRC, Telegram) was already
fully self-contained with no imports from the poc-memory library. Now it's
a proper separate crate with its own Cargo.toml and capnp schema.

poc-memory retains the store, graph, search, neuro, knowledge, and the
jobkit-based memory maintenance daemon (daemon.rs).

Co-Authored-By: ProofOfConcept <poc@bcachefs.org>

poc-memory/src/lib.rs

@@ -0,0 +1,28 @@
+// poc-memory library — shared modules for all binaries
+//
+// Re-exports modules so that memory-search and other binaries
+// can call library functions directly instead of shelling out.
+
+pub mod config;
+pub mod store;
+pub mod util;
+pub mod llm;
+pub mod digest;
+pub mod audit;
+pub mod enrich;
+pub mod consolidate;
+pub mod graph;
+pub mod search;
+pub mod similarity;
+pub mod migrate;
+pub mod neuro;
+pub mod query;
+pub mod spectral;
+pub mod lookups;
+pub mod daemon;
+pub mod fact_mine;
+pub mod knowledge;
+
+pub mod memory_capnp {
+    include!(concat!(env!("OUT_DIR"), "/schema/memory_capnp.rs"));
+}