Merge origin/main: the operator's upload ceiling beside the disk-thread work

One conflict, in §15.3's open list, and it was two changes agreeing rather than
disagreeing: this side removed the rows for the third-party search bound and the
node-announcement bound because both are now built (AV27, AV28), while the other
side kept them and added a new one. Resolved by keeping what is genuinely still
open — per-device revocation having no CLI — and leaving the two closed.

`webrtc_server.py` merged without conflict but the two sides met inside one
function: `_upload_chunk` gained the operator's `max_upload_gb` ceiling from
there and the per-group lock and `off_disk` calls from here. Read back rather
than trusted: the operator's ceiling now sits inside the critical section that
keeps chunk ordering, and the unlink beside it goes to the disk thread with
everything else.

2893 passed. The twelve `test_sticky_header.py[firefox]` setup errors are the
open Firefox on this machine, as before.

1 files changed, 4 insertions, 2 deletions

diff --git a/packages/meshbay-node/tests/test_transfer_settings.py b/packages/meshbay-node/tests/test_transfer_settings.py
index aa24782..bcfa6a8 100644
--- a/packages/meshbay-node/tests/test_transfer_settings.py
+++ b/packages/meshbay-node/tests/test_transfer_settings.py
@@ -139,15 +139,17 @@ async def test_the_node_wide_caps_round_trip_through_the_roster(roster):
         **{k: None for k in ("invite_ttl_hours", "pair_ttl_hours",
                              "device_request_ttl_minutes",
                              "max_concurrent_streams",
-                             "transcode_incompatible_video")},
+                             "transcode_incompatible_video",
+                             "max_upload_gb")},
         "stun_servers": [], "ice_interfaces": [],
     }
     await roster.set_node_setting(roster.SETTING_MAX_DOWNLOADS, "3", "op")
     assert (await roster.node_settings(defaults))["max_concurrent_downloads"] == 3
 
 
-def test_node_toml_carries_both_keys():
+def test_node_toml_carries_the_upload_keys():
     """The template is what an operator reads before they read any document."""
     from meshbay_node.config import EXAMPLE_CONFIG as tpl
     assert "max_concurrent_downloads" in tpl
     assert "max_concurrent_uploads" in tpl
+    assert "max_upload_gb" in tpl