Decouple projects from rounds with RoundProject join table

Projects now exist at the program level instead of being locked to a
single round. A new RoundProject join table enables many-to-many
relationships with per-round status tracking. Rounds have sortOrder
for configurable progression paths.

- Add RoundProject model, programId on Project, sortOrder on Round
- Migration preserves existing data (roundId -> RoundProject entries)
- Update all routers to query through RoundProject join
- Add assign/remove/advance/reorder round endpoints
- Add Assign, Advance, Remove Projects dialogs on round detail page
- Add round reorder controls (up/down arrows) on rounds list
- Show all rounds on project detail page

Co-Authored-By: Claude Opus 4.5 <noreply@anthropic.com>

src/app/(admin)/admin/members/[id]/page.tsx

@@ -329,7 +329,7 @@ export default function MemberDetailPage() {
                     </TableCell>
                     <TableCell>
                       <Badge variant="secondary">
-                        {assignment.project.status}
+                        {assignment.project.roundProjects?.[0]?.status ?? 'SUBMITTED'}
                       </Badge>
                     </TableCell>
                     <TableCell className="text-sm text-muted-foreground">