feat: batch campaigns (#227)

apps/web/prisma/migrations/20251006185736_campaign_batching/migration.sql

@@ -0,0 +1,36 @@
+-- AlterEnum
+-- This migration adds more than one value to an enum.
+-- With PostgreSQL versions 11 and earlier, this is not possible
+-- in a single migration. This can be worked around by creating
+-- multiple migrations, each migration adding only one value to
+-- the enum.
+
+
+ALTER TYPE "CampaignStatus" ADD VALUE 'RUNNING';
+ALTER TYPE "CampaignStatus" ADD VALUE 'PAUSED';
+
+-- AlterTable
+ALTER TABLE "Campaign" ADD COLUMN     "batchSize" INTEGER NOT NULL DEFAULT 500,
+ADD COLUMN     "batchWindowMinutes" INTEGER NOT NULL DEFAULT 0,
+ADD COLUMN     "lastCursor" TEXT,
+ADD COLUMN     "lastSentAt" TIMESTAMP(3),
+ADD COLUMN     "scheduledAt" TIMESTAMP(3);
+
+-- CreateTable
+CREATE TABLE "CampaignEmail" (
+    "campaignId" TEXT NOT NULL,
+    "contactId" TEXT NOT NULL,
+    "emailId" TEXT NOT NULL,
+    "createdAt" TIMESTAMP(3) NOT NULL DEFAULT CURRENT_TIMESTAMP,
+
+    CONSTRAINT "CampaignEmail_pkey" PRIMARY KEY ("campaignId","contactId")
+);
+
+-- CreateIndex
+CREATE INDEX "Campaign_status_scheduledAt_idx" ON "Campaign"("status", "scheduledAt");
+
+-- CreateIndex
+CREATE INDEX "Contact_contactBookId_id_idx" ON "Contact"("contactBookId", "id");
+
+-- CreateIndex
+CREATE INDEX "Email_campaignId_contactId_idx" ON "Email"("campaignId", "contactId");