chore: add server and server_snapshots tables to database schema

- Introduced new tables for managing server configurations and snapshots, enhancing data organization and retrieval.
- The servers table includes fields for server details, while the server_snapshots table captures performance metrics and status updates.

backend/src/db/index.ts

@@ -11,6 +11,45 @@ const sqlite = new Database(env.DATABASE_PATH)
 sqlite.pragma("journal_mode = WAL")
 sqlite.pragma("foreign_keys = ON")
 sqlite.exec(`
+CREATE TABLE IF NOT EXISTS servers (
+  id INTEGER PRIMARY KEY AUTOINCREMENT,
+  name TEXT NOT NULL DEFAULT '',
+  host TEXT NOT NULL,
+  port INTEGER NOT NULL DEFAULT 443,
+  username TEXT NOT NULL DEFAULT 'admin',
+  password TEXT NOT NULL DEFAULT '',
+  use_ssl INTEGER NOT NULL DEFAULT 1,
+  verify_ssl INTEGER NOT NULL DEFAULT 0,
+  type TEXT NOT NULL DEFAULT 'home-router',
+  site TEXT NOT NULL DEFAULT '',
+  country TEXT NOT NULL DEFAULT '',
+  asn TEXT NOT NULL DEFAULT '',
+  comment TEXT NOT NULL DEFAULT '',
+  enabled INTEGER NOT NULL DEFAULT 1,
+  lan_subnet TEXT NOT NULL DEFAULT '',
+  wan_uplinks TEXT NOT NULL DEFAULT '[]',
+  created_at TEXT NOT NULL DEFAULT (datetime('now')),
+  updated_at TEXT NOT NULL DEFAULT (datetime('now'))
+);
+
+CREATE TABLE IF NOT EXISTS server_snapshots (
+  id INTEGER PRIMARY KEY AUTOINCREMENT,
+  server_id INTEGER NOT NULL,
+  polled_at TEXT NOT NULL,
+  status TEXT NOT NULL,
+  latency_ms REAL,
+  ros_version TEXT,
+  board_name TEXT,
+  uptime TEXT,
+  cpu_load INTEGER,
+  free_memory INTEGER,
+  total_memory INTEGER,
+  identity_name TEXT,
+  raw_interfaces TEXT,
+  raw_ip_addresses TEXT,
+  FOREIGN KEY (server_id) REFERENCES servers(id) ON DELETE CASCADE
+);
+
 CREATE TABLE IF NOT EXISTS filter_rules (
   id INTEGER PRIMARY KEY AUTOINCREMENT,
   server_id INTEGER NOT NULL,