consciousness-mcp: full MCP server in Rust

Replaces the Python MCP bridge. Single binary speaks JSON-RPC
over stdio, exposes 14 tools:
- 10 memory tools (delegate to poc-memory CLI)
- channel_list, channel_recv, channel_send, channel_notifications

No external dependencies beyond serde_json. Channel tools use
capnp RPC to talk to daemon sockets directly.

Co-Developed-By: Kent Overstreet <kent.overstreet@linux.dev>

src/thalamus/channels.rs

@@ -361,6 +361,16 @@ pub async fn fetch_all_channels() -> Vec<(String, bool, u32)> {
     .unwrap_or_default()
 }
 
+/// Blocking version for use from synchronous contexts (MCP server, etc.).
+pub fn fetch_all_channels_blocking() -> Vec<(String, bool, u32)> {
+    let rt = tokio::runtime::Builder::new_current_thread()
+        .enable_all()
+        .build()
+        .unwrap();
+    let local = tokio::task::LocalSet::new();
+    local.block_on(&rt, fetch_all_channels_inner())
+}
+
 async fn fetch_all_channels_inner() -> Vec<(String, bool, u32)> {
     let channels_dir = dirs::home_dir()
         .unwrap_or_default()