`IndexingRescanner` doesn't generate `DELETED` events for content items of moved/renamed directories

[sungshik]

To reproduce

// Create file tree
var parent = Files.createTempDirectory("");
var child1 = Files.createDirectories(parent.resolve("from"));
var child2 = Files.createDirectories(parent.resolve("to"));

// Create directory to be moved
var directory = Files.createDirectory(child1.resolve("directory"));
Files.createFile(directory.resolve("file1.txt"));
Files.createFile(directory.resolve("file2.txt"));

// Start a watch for the whole file tree
try (var watch = Watch
 .build(parent, WatchScope.PATH_AND_ALL_DESCENDANTS)
 .onOverflow(Approximation.DIFF)
 .on(System.out::println)
 .start()) {

 // Move directory
 var source = child1.resolve(directory.getFileName());
 var target = child2.resolve(directory.getFileName());
 Files.move(source, target);

 // Wait for events
 Thread.sleep(30000);
}

System.exit(0);

Expected output

DELETED events for file1.txt and file2.txt.

Actual output

No such events:

WatchEvent[C:\Users\sung-\AppData\Local\Temp\16629189291729839418, DELETED, from\directory]
WatchEvent[C:\Users\sung-\AppData\Local\Temp\16629189291729839418, CREATED, to\directory]
WatchEvent[C:\Users\sung-\AppData\Local\Temp\16629189291729839418, MODIFIED, to]
WatchEvent[C:\Users\sung-\AppData\Local\Temp\16629189291729839418, OVERFLOW, to\directory]
WatchEvent[C:\Users\sung-\AppData\Local\Temp\16629189291729839418, CREATED, to\directory\file1.txt]
WatchEvent[C:\Users\sung-\AppData\Local\Temp\16629189291729839418, CREATED, to\directory\file2.txt]