fix(node): scope _enriched_attempted by group, not just content hash0.7

Major finding: entry.id is a content hash, so the exact same physical
file — the same MP3, byte-for-byte — indexed into two different groups
(a shared library reused across several demo/test groups, or genuinely
the same folder shared into two groups) produces the *same id* in both.
_enriched_attempted was a single flat set of bare ids shared across every
group this node hosts. The moment one group's copy got enriched, every
other group's otherwise-identical copy read as "already attempted" and
was skipped forever — nothing else ever revisits an id once it's in this
set. That group's Music tab (or Videos tab, same bug, same set) showed
every affected file at duration 0 with no artist/album/thumbnail,
permanently, no matter how long you waited or how many times you
reloaded — group A having been enriched first was enough to silently
starve every later group of the same content.

Now keyed by (group_id, entry.id) throughout — the enrichment gate, the
sweep, and the rename re-enrichment path, for both video and audio (they
already shared the one set, and the collision risk is identical for
both). New regression test constructs two groups with byte-identical
audio content and confirms both enrich independently.

1 files changed, 3 insertions, 3 deletions

diff --git a/packages/meshbay-node/tests/test_video_root_gates_enrichment.py b/packages/meshbay-node/tests/test_video_root_gates_enrichment.py
index df86a79..9cfb819 100644
--- a/packages/meshbay-node/tests/test_video_root_gates_enrichment.py
+++ b/packages/meshbay-node/tests/test_video_root_gates_enrichment.py
@@ -108,8 +108,8 @@ async def test_only_entries_under_the_configured_root_are_enriched(tmp_path):
         await asyncio.sleep(0.05)
 
         by_name = {e.name: e for e in indexer.index.entries}
-        assert by_name["in-root.mkv"].id in daemon._enriched_attempted
-        assert by_name["outside.mkv"].id not in daemon._enriched_attempted, (
+        assert (group_id, by_name["in-root.mkv"].id) in daemon._enriched_attempted
+        assert (group_id, by_name["outside.mkv"].id) not in daemon._enriched_attempted, (
             "a file outside the configured video_root must never be enriched")
     finally:
         await _teardown(daemon)
@@ -146,7 +146,7 @@ async def test_setting_the_video_root_sweeps_what_it_already_contains(tmp_path):
         await asyncio.sleep(0.05)  # let the fire-and-forget sweep actually run
 
         entry = next(iter(indexer.index.entries))
-        assert entry.id in daemon._enriched_attempted, (
+        assert (group_id, entry.id) in daemon._enriched_attempted, (
             "a file already sitting in the newly-chosen root must be picked "
             "up by the sweep, not wait for some unrelated future change")
     finally: