Add Doris Schoolhouse and clean pending homelab changes

home/doris-schoolhouse/app/routes/api_dashboard.py

@@ -0,0 +1,31 @@
+from fastapi import APIRouter
+
+from app.services.d2l import D2LService
+from app.services.repository import get_repository
+
+
+router = APIRouter(prefix="/api/dashboard", tags=["dashboard"])
+repo = get_repository()
+d2l = D2LService()
+
+
+@router.get("/summary")
+async def dashboard_summary():
+    courses = d2l.get_courses()
+    assignments = repo.list_assignments()
+    submissions = repo.list_submissions()
+    recordings = repo.list_recordings()
+    sync_runs = repo.list_sync_runs()
+    return {
+        "backend": repo.backend,
+        "counts": {
+            "courses": len(courses),
+            "assignments": len(assignments),
+            "submissions": len(submissions),
+            "recordings": len(recordings),
+        },
+        "latest_sync": sync_runs[-1] if sync_runs else None,
+        "recent_assignments": assignments[:8],
+        "recent_submissions": submissions[:8],
+        "recent_recordings": recordings[:8],
+    }