382e1801a7
Adds List<String> instanceIds to LogSearchRequest (null-normalized to List.of() in compact ctor) and generates an IN clause in both ClickHouseLogStore.search() and countLogs(), mirroring the existing sources pattern. LogQueryController parses ?instanceIds= as a comma-split list. All existing LogSearchRequest call sites updated. New ClickHouseLogStoreInstanceIdsIT covers: multi-value filter, empty filter (all rows), null filter (all rows), single-value filter, and coexistence with the singular instanceId field. Co-Authored-By: Claude Sonnet 4.6 <noreply@anthropic.com>