Docker container URL preserved on update (#1054): container updates
recreate the container with a new runtime ID. The agent now includes
{oldContainerId, newContainerId} in the completion ACK payload; the
server uses this to copy persisted metadata (custom URLs, descriptions,
tags) to the new ID so nothing is lost. Migration is a copy, not a move,
so rollback scenarios still find metadata under the original ID.
Reduce metrics.db write amplification (#1124): add a UNIQUE index on
(resource_type, resource_id, metric_type, timestamp, tier) so rollup
reprocessing after a failed checkpoint uses INSERT OR IGNORE instead of
creating duplicate rows. Existing duplicates are deduplicated once on
startup if the index creation would otherwise fail. Also sets
wal_autocheckpoint(500) to checkpoint the WAL more frequently, preventing
unbounded WAL growth.
Fixes#1054Fixes#1124
The GuestURL field was missing from NodeFrontend and its converter,
causing configured Guest URLs to be ignored when clicking on cluster
node names. The frontend would fall back to the auto-detected IP
instead of using the user-configured Guest URL.
Related to #940
