Fix database schema: add group_id to CREATE TABLE instead of separate migration

server/database.js

@@ -20,6 +20,7 @@ db.exec(`
     check_interval INTEGER DEFAULT 60000,
     timeout INTEGER DEFAULT 5000,
     enabled INTEGER DEFAULT 1,
+    group_id INTEGER REFERENCES groups(id) ON DELETE SET NULL,
     created_at DATETIME DEFAULT CURRENT_TIMESTAMP
   );
 
@@ -30,6 +31,7 @@ db.exec(`
     response_time INTEGER,
     status_code INTEGER,
     error_message TEXT,
+    details TEXT,
     checked_at DATETIME DEFAULT CURRENT_TIMESTAMP,
     FOREIGN KEY (resource_id) REFERENCES resources(id) ON DELETE CASCADE
   );
@@ -49,7 +51,7 @@ db.exec(`
   CREATE INDEX IF NOT EXISTS idx_resources_group_id ON resources(group_id);
 `);
 
-// Lightweight migrations
+// Lightweight migrations - for existing databases
 try {
   db.prepare("ALTER TABLE checks ADD COLUMN details TEXT").run();
 } catch (err) {
@@ -57,7 +59,7 @@ try {
 }
 
 try {
-  db.prepare("ALTER TABLE resources ADD COLUMN group_id INTEGER REFERENCES groups(id) ON DELETE SET NULL").run();
+  db.prepare("ALTER TABLE resources ADD COLUMN group_id INTEGER").run();
 } catch (err) {
   // Column already exists
 }