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>

src/neuro/mod.rs

@@ -1,29 +0,0 @@
-// Neuroscience-inspired memory algorithms, split by concern:
-//
-//   scoring  — pure analysis: priority, replay queues, interference, plans
-//   prompts  — agent prompt generation and formatting
-//   rewrite  — graph topology mutations: differentiation, closure, linking
-
-mod scoring;
-mod prompts;
-mod rewrite;
-
-// Re-export public API so `neuro::` paths continue to work.
-
-pub use scoring::{
-    replay_queue, detect_interference,
-    consolidation_plan, format_plan,
-    daily_check,
-};
-
-pub use prompts::{
-    load_prompt,
-    consolidation_batch, agent_prompt,
-};
-
-pub use rewrite::{
-    refine_target, LinkMove,
-    differentiate_hub,
-    apply_differentiation, find_differentiable_hubs,
-    triangle_close, link_orphans,
-};