docs(gpodder): document session last_seen timestamp's precision should be at least to the second

gpodder/src/store.rs

@@ -45,6 +45,8 @@ pub trait AuthStore {
     fn insert_user(&self, username: &str, password_hash: &str) -> Result<User, AuthErr>;
 
     /// Create a new session for a user with the given session ID
+    ///
+    /// The `last_seen` timestamp's precision should be at least accurate to the second
     fn insert_session(&self, session: &Session) -> Result<(), AuthErr>;
 
     /// Remove the session with the given session ID

gpodder_sqlite/tests/auth_test.rs

@@ -1,5 +1,6 @@
 mod common;
 
+use chrono::SubsecRound;
 use gpodder::{AuthStore, Session};
 use gpodder_sqlite::SqliteRepository;
 
@@ -34,7 +35,8 @@ fn test_create_session() {
 
     let new_session = Session {
         id: 123,
-        last_seen: chrono::Utc::now(),
+        //
+        last_seen: chrono::Utc::now().trunc_subsecs(0),
         user: users[0].clone(),
     };