refactor(cdb): create separate migration module

databases/curriculum/src/bin/cdb-migrate.rs

@@ -7,6 +7,8 @@
 //! Env: `CDB_MIGRATOR_URL`, naming the database (`.../curriculum`), never a `db/branch` revision.
 use std::{process::ExitCode, time::Duration};
 
+use cdb::migrations;
+
 /// Bounds the whole run: waiting for another run's lock, then applying and merging. The deploy
 /// Action's MIGRATE_SECONDS must stay above this plus the image pull. A run cut short ends its
 /// session, which releases the lock; anything it left is on the scratch branch, which the next run
@@ -24,13 +26,13 @@ async fn main() -> ExitCode {
         return ExitCode::from(2);
     };
 
-    match tokio::time::timeout(TIMEOUT, cdb::migrate(&url)).await {
+    match tokio::time::timeout(TIMEOUT, migrations::migrate(&url)).await {
         Ok(Ok(applied)) if applied.is_empty() => {
             println!("cDb up to date");
             ExitCode::SUCCESS
         }
         Ok(Ok(applied)) => {
-            println!("cDb migrations applied to {}: {applied:?}", cdb::DEV);
+            println!("cDb migrations applied to {}: {applied:?}", migrations::DEV);
             ExitCode::SUCCESS
         }
         Ok(Err(err)) => {

databases/curriculum/src/edd/exams.rs

@@ -0,0 +1,20 @@
+use crate::Database;
+
+pub async fn create(
+    db: &Database,
+    id: &str,
+    slug: &str,
+    title: &str,
+    instructions: &str,
+) -> sqlx::Result<()> {
+    sqlx::query(
+        "INSERT INTO exams (id, slug, title, instructions, status) VALUES (?, ?, ?, ?, 'disabled')",
+    )
+    .bind(id)
+    .bind(slug)
+    .bind(title)
+    .bind(instructions)
+    .execute(&db.pool)
+    .await?;
+    Ok(())
+}

databases/curriculum/src/edd/mod.rs

@@ -1 +1,3 @@
 //! Schema `edd`: eDd's tables. aAPI has no access.
+
+pub mod exams;