chore: remove integrator/kestra CI jobs, fix school website link protocol

- Remove build-integrator and build-kestra-init jobs from Gitea Actions
- Update trigger-deployment needs to only depend on remaining three builds
- Fix school website href to prepend https:// when protocol is missing

Co-Authored-By: Claude Sonnet 4.6 <noreply@anthropic.com>

nextjs-app/components/SchoolDetailView.tsx

@@ -154,7 +154,7 @@ export function SchoolDetailView({
               )}
               {schoolInfo.website && (
                 <span className={styles.headerDetail}>
-                  <a href={schoolInfo.website} target="_blank" rel="noopener noreferrer">
+                  <a href={/^https?:\/\//i.test(schoolInfo.website) ? schoolInfo.website : `https://${schoolInfo.website}`} target="_blank" rel="noopener noreferrer">
                     School website ↗
                   </a>
                 </span>