nit: add DB version is discrepancy recording (#10762)

codex-rs/core/src/state_db.rs

@@ -14,6 +14,7 @@ use codex_protocol::protocol::RolloutItem;
 use codex_protocol::protocol::SessionSource;
 use codex_state::DB_METRIC_COMPARE_ERROR;
 pub use codex_state::LogEntry;
+use codex_state::STATE_DB_VERSION;
 use codex_state::ThreadMetadataBuilder;
 use serde_json::Value;
 use std::path::Path;
@@ -504,7 +505,11 @@ pub fn record_discrepancy(stage: &str, reason: &str) {
         let _ = metric.counter(
             DB_METRIC_COMPARE_ERROR,
             1,
-            &[("stage", stage), ("reason", reason)],
+            &[
+                ("stage", stage),
+                ("reason", reason),
+                ("version", &STATE_DB_VERSION.to_string()),
+            ],
         );
     }
 }

codex-rs/state/src/runtime.rs

@@ -38,7 +38,7 @@ use std::time::Duration;
 use tracing::warn;
 
 pub const STATE_DB_FILENAME: &str = "state";
-pub const STATE_DB_VERSION: u32 = 2;
+pub const STATE_DB_VERSION: u32 = 3;
 
 const METRIC_DB_INIT: &str = "codex.db.init";