CLI: convert node commands to typed async API

- node.rs: use memory::* typed helpers instead of memory_rpc()
- main.rs: make Run trait async, await all command dispatch
- defs.rs: bridge get_group_content async via block_in_place

Co-Authored-By: Proof of Concept <poc@bcachefs.org>

src/subconscious/defs.rs

@@ -303,7 +303,12 @@ fn resolve(
             let mut keys = Vec::new();
             for group in &cfg.context_groups {
                 if !group.agent { continue; }
-                let entries = crate::cli::node::get_group_content(group, &cfg);
+                // Bridge sync→async using block_in_place (same as resolve_tool)
+                let entries = tokio::task::block_in_place(|| {
+                    tokio::runtime::Handle::current().block_on(
+                        crate::cli::node::get_group_content(group, &cfg)
+                    )
+                });
                 for (key, content) in entries {
                     use std::fmt::Write;
                     writeln!(text, "--- {} ({}) ---", key, group.label).ok();