feat: sqlite 1 (#10004)

Add a `.sqlite` database to be used to store rollout metatdata (and
later logs)
This PR is phase 1:
* Add the database and the required infrastructure
* Add a backfill of the database
* Persist the newly created rollout both in files and in the DB
* When we need to get metadata or a rollout, consider the `JSONL` as the
source of truth but compare the results with the DB and show any errors

codex-rs/core/src/features.rs

@@ -101,6 +101,8 @@ pub enum Feature {
     RemoteModels,
     /// Experimental shell snapshotting.
     ShellSnapshot,
+    /// Persist rollout metadata to a local SQLite database.
+    Sqlite,
     /// Append additional AGENTS.md guidance to user instructions.
     ChildAgentsMd,
     /// Enforce UTF8 output in Powershell.
@@ -377,6 +379,12 @@ pub const FEATURES: &[FeatureSpec] = &[
         },
         default_enabled: false,
     },
+    FeatureSpec {
+        id: Feature::Sqlite,
+        key: "sqlite",
+        stage: Stage::UnderDevelopment,
+        default_enabled: false,
+    },
     FeatureSpec {
         id: Feature::ChildAgentsMd,
         key: "child_agents_md",