feat(mcp): Add 5 developer enhancements (git, logs, clipboard watcher, ast skeleton, nvim ghost text)

server/src/db.rs

@@ -5,7 +5,15 @@ use std::sync::Arc;
 
 pub fn init_redb(base: &Path) -> Arc<Database> {
     let redb_path = base.join("mcp_store.redb");
-    let db = Arc::new(redb::Database::create(&redb_path).expect("Failed to create redb database"));
+    let db = match redb::Database::create(&redb_path) {
+        Ok(db) => Arc::new(db),
+        Err(e) => {
+            let err_msg = format!("CRITICAL FATAL ERROR: Failed to open or create redb database at {:?}. Error: {}. This almost always means another instance of mcp-memory-server is already running and holds the exclusive file lock on the database.", redb_path, e);
+            eprintln!("{}", err_msg);
+            tracing::error!("{}", err_msg);
+            std::process::exit(1);
+        }
+    };
 
     // Ensure the table exists and migrate legacy JSON files
     let write_txn = db.begin_write().expect("Failed to begin write txn on redb");