fix: resolve ownership and borrowing errors and add serde traits

Co-authored-by: aider (openai/andrew/openrouter/google/gemini-2.5-pro) <aider@aider.chat>

src/db.rs

@@ -1,6 +1,7 @@
 use anyhow::{Context, Error, Result};
 use chrono::prelude::*;
 use lazy_static::lazy_static;
+use serde::{Deserialize, Serialize};
 use log::*;
 use rusqlite::{Connection, OpenFlags, params};
 use rusqlite_migration::{M, Migrations};
@@ -37,7 +38,7 @@ lazy_static! {
     ]);
 }
 
-#[derive(Debug, Clone)]
+#[derive(Debug, Clone, Serialize, Deserialize)]
 pub struct Item {
     pub id: Option<i64>,
     pub ts: DateTime<Utc>,
@@ -45,13 +46,13 @@ pub struct Item {
     pub compression: String,
 }
 
-#[derive(Debug, Clone)]
+#[derive(Debug, Clone, Serialize, Deserialize)]
 pub struct Tag {
     pub id: i64,
     pub name: String,
 }
 
-#[derive(Debug, Clone)]
+#[derive(Debug, Clone, Serialize, Deserialize)]
 pub struct Meta {
     pub id: i64,
     pub name: String,