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/server/routers/specialAward.ts

@@ -237,22 +237,29 @@ export const specialAwardRouter = router({
       const statusFilter = input.includeSubmitted
         ? (['SUBMITTED', 'ELIGIBLE', 'ASSIGNED', 'SEMIFINALIST', 'FINALIST'] as const)
         : (['ELIGIBLE', 'ASSIGNED', 'SEMIFINALIST', 'FINALIST'] as const)
-      const projects = await ctx.prisma.project.findMany({
+      const roundProjectEntries = await ctx.prisma.roundProject.findMany({
         where: {
           round: { programId: award.programId },
           status: { in: [...statusFilter] },
         },
-        select: {
-          id: true,
-          title: true,
-          description: true,
-          competitionCategory: true,
-          country: true,
-          geographicZone: true,
-          tags: true,
-          oceanIssue: true,
+        include: {
+          project: {
+            select: {
+              id: true,
+              title: true,
+              description: true,
+              competitionCategory: true,
+              country: true,
+              geographicZone: true,
+              tags: true,
+              oceanIssue: true,
+            },
+          },
         },
       })
+      // Deduplicate projects (same project may be in multiple rounds)
+      const projectMap = new Map(roundProjectEntries.map((rp) => [rp.project.id, rp.project]))
+      const projects = Array.from(projectMap.values())
 
       if (projects.length === 0) {
         throw new TRPCError({