feat: let the operator pause and resume a root's indexing (MNP 6.2)

A whole-root walk now checks its root before every file: removed or
ejected, it stops instead of reading the drive to the end; paused, it
finishes from the hash cache alone. A paused root is not watched, not
swept by reconcile and survives a restart (roster), its indexed files
stay served. Resume runs the reconcile sweep over the root, so entries
and their enrichment are kept.

Signed root_pause / root_resume over MNP, loopback routes, CLI
`root pause|resume`, a pause button on the indexing dock and
pause/resume in the roots table of Group settings.

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

1 files changed, 7 insertions, 6 deletions

diff --git a/packages/meshbay-node/tests/test_roots.py b/packages/meshbay-node/tests/test_roots.py
index 0fe9f03..30bbc8a 100644
--- a/packages/meshbay-node/tests/test_roots.py
+++ b/packages/meshbay-node/tests/test_roots.py
@@ -290,9 +290,9 @@ def test_describe_reports_what_a_member_needs(tmp_path):
     described = roots.describe()
     assert described == [
         {"name": "Media", "kind": "generic", "available": True,
-         "writable": True, "removable": False, "ejected": False},
+         "writable": True, "removable": False, "ejected": False, "paused": False},
         {"name": "Music", "kind": "audio", "available": True,
-         "writable": False, "removable": True, "ejected": False},
+         "writable": False, "removable": True, "ejected": False, "paused": False},
     ]
     # Deliberately no paths: a member is told what exists and whether it is
     # readable, not where on the operator's disk it lives.
@@ -301,15 +301,16 @@ def test_describe_reports_what_a_member_needs(tmp_path):
 
 def test_describe_names_a_root_and_never_a_path(tmp_path):
     """
-    What a member is told about a root: that it exists, and whether it is
-    readable and writable. Never where on the operator's disk it lives — that
-    is the operator's own view (`with_paths`), over their own channel.
+    What a member is told about a root: that it exists, whether it is
+    readable and writable, and whether its indexing is paused. Never where on
+    the operator's disk it lives — that is the operator's own view
+    (`with_paths`), over their own channel.
     """
     (tmp_path / "Media").mkdir()
     roots = RootSet.build([_spec(tmp_path / "Media", writable=True)])
     described = roots.describe()[0]
     assert set(described) == {"name", "kind", "available", "writable",
-                              "removable", "ejected"}
+                              "removable", "ejected", "paused"}
 
 
 # ── SAFE_UPLOAD_NAME ────────────────────────────────────────────────────────