When KUBERNETES_NAMESPACE is unset, startReloader logged
"will detect changes in all namespaces." unconditionally, even when
--namespaces-to-ignore was set, which is misleading.
Extract the scope message into namespaceWatchScopeMessage(), move the log
after ignoredNamespacesList is resolved, and include the excluded
namespaces in the message when filtering is active.
Closes#1131
Assisted-by: Claude Code (Anthropic, Opus 4.x)
