refactor: Remove lti_deployment_id and state from LTI structs and simplify lesson dependency query.

services/lms-service/src/handlers.rs

@@ -1023,13 +1023,11 @@ pub async fn get_lesson_content(
     // We check if there are any prerequisites that the user hasn't completed yet.
     #[derive(sqlx::FromRow)]
     struct UnmetDep { 
-        prerequisite_lesson_id: Uuid, 
         prereq_title: String, 
-        min_score_percentage: Option<f32> 
     }
     let unmet_dependencies: Vec<UnmetDep> = sqlx::query_as(
         r#"
-        SELECT ld.prerequisite_lesson_id, p.title as prereq_title, ld.min_score_percentage::float4 as min_score_percentage
+        SELECT p.title as prereq_title
         FROM lesson_dependencies ld
         JOIN lessons p ON ld.prerequisite_lesson_id = p.id
         LEFT JOIN user_grades ug ON ld.prerequisite_lesson_id = ug.lesson_id AND ug.user_id = $2

services/lms-service/src/lti.rs

@@ -19,7 +19,6 @@ pub struct LtiLoginParams {
     pub target_link_uri: String,
     pub lti_message_hint: Option<String>,
     pub client_id: Option<String>,
-    pub lti_deployment_id: Option<String>,
 }
 
 pub async fn lti_login_initiation(
@@ -69,7 +68,6 @@ pub async fn lti_login_initiation(
 #[derive(Deserialize)]
 pub struct LtiLaunchParams {
     pub id_token: String,
-    pub state: String,
 }
 
 pub async fn validate_lti_jwt(