Rename `timeToLiveSeconds` to `timeToLive` in
`CassandraChatMemoryProperties` and associated code to prevent
misleading interpretation. This change addresses issue #1728, as
the property previously suggested values in seconds but expected
milliseconds.
Improve readability and ensure accurate configuration by aligning
the name with its behavior. Include updates to test cases to
validate the new property name and verify ISO 8601 format handling.
Fixes#1728
Signed-off-by: Jihoon Kim <pigberger70@gmail.com>
a7a1804fac