[pruner] enable periodic compaction of individual SST files by default (

#20101)

## Description 
enables periodic compaction of individual SST files by default

---

## Release notes

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- [ ] Protocol: 
- [ ] Nodes (Validators and Full nodes): 
- [ ] Indexer: 
- [ ] JSON-RPC: 
- [ ] GraphQL: 
- [ ] CLI: 
- [ ] Rust SDK:
- [ ] REST API:

crates/sui-config/src/node.rs

@@ -683,7 +683,10 @@ pub struct AuthorityStorePruningConfig {
     /// enables periodic background compaction for old SST files whose last modified time is
     /// older than `periodic_compaction_threshold_days` days.
     /// That ensures that all sst files eventually go through the compaction process
-    #[serde(skip_serializing_if = "Option::is_none")]
+    #[serde(
+        default = "default_periodic_compaction_threshold_days",
+        skip_serializing_if = "Option::is_none"
+    )]
     pub periodic_compaction_threshold_days: Option<usize>,
     /// number of epochs to keep the latest version of transactions and effects for
     #[serde(skip_serializing_if = "Option::is_none")]
@@ -715,6 +718,10 @@ fn default_smoothing() -> bool {
     cfg!(not(test))
 }
 
+fn default_periodic_compaction_threshold_days() -> Option<usize> {
+    Some(1)
+}
+
 impl Default for AuthorityStorePruningConfig {
     fn default() -> Self {
         Self {