feat(node): skip a file the disk stops answering for, then pause its root

A Windows tester's scan stuck for good on one directory of a large disk:
one read that never returned held the indexer's only thread, and with it
every root behind that one.

- A disk call is timed by its silence, not its length: each directory
  entry listed and each megabyte read counts as an answer. After 60 s of
  silence the call is abandoned on its daemon thread, the file is noted
  unread and the scan goes on.
- Three silent files in a row pause the root (not persisted). Resume
  skips the files already known to give no answer; a restart, a replug
  or a change to the file retries them.
- The walk is per directory with os.scandir: a subdirectory that cannot
  be listed costs itself, and a listing that stops answering pauses the
  root at once. A scan no longer stats anything from the event loop.
- The log names the file after 10 s of silence, the indexing band shows
  it, and Group settings shows the paused root, where it stuck and the
  unread files with their reason, on the node's machine only.
- generate_http_api.py writes LF on Windows too.

Verified with real kernel-blocked opens (an unacknowledged oplock) in the
installed frozen app.

Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com>

1 files changed, 2 insertions, 2 deletions

diff --git a/packages/meshbay-node/tests/test_scan_progress_is_not_clobbered.py b/packages/meshbay-node/tests/test_scan_progress_is_not_clobbered.py
index 1f93ffa..056c0b9 100644
--- a/packages/meshbay-node/tests/test_scan_progress_is_not_clobbered.py
+++ b/packages/meshbay-node/tests/test_scan_progress_is_not_clobbered.py
@@ -56,13 +56,13 @@ class _Held(DirectoryIndexer):
         self.rescanned: list[str] = []
         self._seen = 0
 
-    async def _hash_or_cached(self, root, file_path):
+    async def _hash_or_cached(self, root, file_path, **kw):
         if self.hold_under is not None and file_path.is_relative_to(self.hold_under):
             if self._seen == self.hold_after:
                 self.at_gate.set()
                 await self.gate.wait()
             self._seen += 1
-        return await super()._hash_or_cached(root, file_path)
+        return await super()._hash_or_cached(root, file_path, **kw)
 
     async def _rescan_root(self, root):
         self.rescanned.append(root.name)