Add Democratic fundraising platform.

Co-authored-by: Cursor <cursoragent@cursor.com>

prisma/migrations/20260510230000_mission_spend/migration.sql

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+-- AlterEnum
+ALTER TYPE "LedgerType" ADD VALUE 'DEBIT_MISSION_SPEND';
+
+-- CreateTable
+CREATE TABLE "MissionSpend" (
+    "id" TEXT NOT NULL,
+    "userId" TEXT NOT NULL,
+    "missionSlug" TEXT NOT NULL,
+    "missionTitle" TEXT NOT NULL,
+    "creditsSpent" INTEGER NOT NULL,
+    "supporterNote" TEXT,
+    "createdAt" TIMESTAMP(3) NOT NULL DEFAULT CURRENT_TIMESTAMP,
+
+    CONSTRAINT "MissionSpend_pkey" PRIMARY KEY ("id")
+);
+
+-- CreateIndex
+CREATE INDEX "MissionSpend_userId_idx" ON "MissionSpend"("userId");
+
+-- CreateIndex
+CREATE INDEX "MissionSpend_missionSlug_idx" ON "MissionSpend"("missionSlug");
+
+-- AddForeignKey
+ALTER TABLE "MissionSpend" ADD CONSTRAINT "MissionSpend_userId_fkey" FOREIGN KEY ("userId") REFERENCES "User"("id") ON DELETE CASCADE ON UPDATE CASCADE;
+
+-- AlterTable
+ALTER TABLE "LedgerEntry" ADD COLUMN "missionSpendId" TEXT;
+
+-- CreateIndex
+CREATE UNIQUE INDEX "LedgerEntry_missionSpendId_key" ON "LedgerEntry"("missionSpendId");
+
+-- AddForeignKey
+ALTER TABLE "LedgerEntry" ADD CONSTRAINT "LedgerEntry_missionSpendId_fkey" FOREIGN KEY ("missionSpendId") REFERENCES "MissionSpend"("id") ON DELETE SET NULL ON UPDATE CASCADE;