force dumpless upgrade to recompute stats

crates/milli/src/update/upgrade/v1_13.rs

@@ -0,0 +1,29 @@
+use heed::RwTxn;
+
+use super::UpgradeIndex;
+use crate::constants::{VERSION_MAJOR, VERSION_MINOR, VERSION_PATCH};
+use crate::progress::Progress;
+use crate::{Index, Result};
+
+#[allow(non_camel_case_types)]
+pub(super) struct V1_13_0_To_Current();
+
+impl UpgradeIndex for V1_13_0_To_Current {
+    fn upgrade(
+        &self,
+        _wtxn: &mut RwTxn,
+        _index: &Index,
+        _original: (u32, u32, u32),
+        _progress: Progress,
+    ) -> Result<bool> {
+        Ok(false)
+    }
+
+    fn target_version(&self) -> (u32, u32, u32) {
+        (
+            VERSION_MAJOR.parse().unwrap(),
+            VERSION_MINOR.parse().unwrap(),
+            VERSION_PATCH.parse().unwrap(),
+        )
+    }
+}