poc-memory: load AppConfig at startup

admin load-context (and any subcommand that reaches config::app())
panicked with "config::app() called before load_app()" because the
poc-memory binary never initialized the global AppConfig. The main
consciousness binary loads it via load_session; poc-memory never did.

Load with default CliArgs before dispatch — figment still pulls from
~/.consciousness/config.json5 and env the same way. Bail on error
instead of limping: a broken config means paths like memory_root are
wrong and the tool will misbehave silently.

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

src/main.rs

@@ -482,6 +482,14 @@ async fn main() {
 
     let cli = Cli::parse();
 
+    // Some subcommands (e.g. admin load-context) read from the global
+    // AppConfig. poc-memory has no config CLI flags of its own, so load
+    // with defaults — figment still pulls from ~/.consciousness/config.json5
+    // and env the same way.
+    if let Err(e) = crate::config::load_app(&crate::user::CliArgs::default()) {
+        eprintln!("warning: failed to load config: {:#}", e);
+    }
+
     if let Err(e) = cli.command.run().await {
         eprintln!("Error: {}", e);
         process::exit(1);