feat: refactor parsing and scanning logic for test files

- Updated `parseFilename` to `parseTargetFilename` and modified its return structure to include `test_id` instead of `file_id`.
- Introduced `parseResultFilename` to extract `test_id` and `device` from result file names.
- Enhanced `fullScan` to separately handle target and results directories, improving clarity and functionality.
- Updated database interactions to use `test_id` instead of `file_id` across various modules.
- Added a new `/rescan` endpoint to trigger a full scan of target and results directories.
- Improved logging and error handling throughout the scanning process.
- Introduced `parseTputRssi` to extract throughput and RSSI data from log files.

server/routes/tests.js

@@ -26,7 +26,7 @@ router.get('/', (req, res) => {
   tests.sort((a, b) => {
     const ia = a.interference || '';
     const ib = b.interference || '';
-    return ia.localeCompare(ib) || (a.file_id || '').localeCompare(b.file_id || '');
+    return ia.localeCompare(ib) || (a.test_id || '').localeCompare(b.test_id || '');
   });
 
   res.json(tests);