Add simple tests to GroundController (#297)

* Add comprehensive test suite for GroundController with mocked dependencies

Co-authored-by: overtorment <overtorment@gmail.com>

* Refactor code formatting and remove unnecessary whitespace

Co-authored-by: overtorment <overtorment@gmail.com>

---------

Co-authored-by: Cursor Agent <cursoragent@cursor.com>

Author: Overtorment

src/controller/GroundController.ts

@@ -142,27 +142,29 @@ const purgeIgnoredAddressesSubscriptions = () => {
 
 const killSleepingMySQLProcesses = () => {
   console.log("Checking for sleeping MySQL processes...");
-  
+
   // Query to find processes sleeping for more than 3600 seconds
   const query = `
     SELECT id, user, host, db, command, time, state, info
     FROM information_schema.processlist 
     WHERE command = 'Sleep' AND time > 3600 AND id != CONNECTION_ID()
   `;
-  
-  connection.query(query)
+
+  connection
+    .query(query)
     .then((sleepingProcesses: any[]) => {
       if (sleepingProcesses.length > 0) {
         console.log(`Found ${sleepingProcesses.length} sleeping processes older than 1 hour`);
-        
+
         // Kill each sleeping process
         const killPromises = sleepingProcesses.map((process) => {
           console.log(`Killing process ID ${process.id} (user: ${process.user}, host: ${process.host}, sleeping for ${process.time}s)`);
-          return connection.query(`KILL ${process.id}`)
+          return connection
+            .query(`KILL ${process.id}`)
             .then(() => console.log(`Successfully killed process ${process.id}`))
             .catch((error) => console.log(`Error killing process ${process.id}:`, error.message));
         });
-        
+
         return Promise.all(killPromises);
       } else {
         console.log("No sleeping processes found that are older than 1 hour");