fix: prevent code indexer from skipping workspaces under hidden parent directories

- Modified scanner.ts to pass relative paths instead of absolute paths to isPathInIgnoredDirectory
- This ensures files are only filtered based on hidden directories within the workspace, not parent directories
- Fixes issue #8600 where workspaces under directories like .root were being completely skipped

Author: roomote

src/services/code-index/processors/scanner.ts

@@ -96,7 +96,8 @@ export class DirectoryScanner implements IDirectoryScanner {
 			const relativeFilePath = generateRelativeFilePath(filePath, scanWorkspace)
 
 			// Check if file is in an ignored directory using the shared helper
-			if (isPathInIgnoredDirectory(filePath)) {
+			// Use relative path to avoid filtering out workspaces under hidden parent directories
+			if (isPathInIgnoredDirectory(relativeFilePath)) {
 				return false
 			}