Lower document retention from 80 days to 79 days (#42911)

GitOrigin-RevId: 72f9095d90cdbe3432ef74b021d3c203ddb93b9b

Author: emmaling27

crates/common/src/knobs.rs

@@ -408,7 +408,7 @@ pub static INDEX_RETENTION_DELAY: LazyLock<Duration> =
 ///
 /// Smaller window means we keep less historical data around.
 pub static DOCUMENT_RETENTION_DELAY: LazyLock<Duration> = LazyLock::new(|| {
-    Duration::from_secs(env_config("DOCUMENT_RETENTION_DELAY", 60 * 60 * 24 * 80))
+    Duration::from_secs(env_config("DOCUMENT_RETENTION_DELAY", 60 * 60 * 24 * 79))
 });
 
 /// When to start rejecting new additions to the search memory index.