feature(krata): rework api and make ip assignment persistent to database

crates/daemon/src/db/mod.rs

@@ -0,0 +1,21 @@
+use anyhow::Result;
+use redb::Database;
+use std::path::Path;
+use std::sync::Arc;
+
+pub mod ip;
+pub mod zone;
+
+#[derive(Clone)]
+pub struct KrataDatabase {
+    pub database: Arc<Database>,
+}
+
+impl KrataDatabase {
+    pub fn open(path: &Path) -> Result<Self> {
+        let database = Database::create(path)?;
+        Ok(KrataDatabase {
+            database: Arc::new(database),
+        })
+    }
+}