URLs saved through the resource drawer historically landed in the docker
store under the runtime container key, which any stable record (including
an intentionally empty cleared one) outranks in the unified customUrl
projection, and which orphans on container recreation. On report ingest,
copy those records into the stable app-container guest key when it is
missing (cleared links stay cleared), healing saves stranded before the
drawer moved to the stable identity. Also read the runtime key before its
copy-if-missing container-name snapshot so the freshest write wins among
the docker-store fallbacks.
Refs #1556
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
rcourtman