Portal: move Schedule to per-License-Key with daily/weekly and Block.day

Adds Schedule.licenseKeyId (unique, nullable) and Schedule.type, makes the
legacy userId optional/non-unique, adds Block.day and flips Block
dynamicAudio default to true. The migration backfills each existing
per-user schedule onto that account's oldest License Key as a daily
schedule, preserves unmappable schedules (licenseKeyId NULL) with a
NOTICE, and is reversible. Tested up/down against a scratch schema.

prisma/migrations/20260929130000_move_schedule_to_license_key/migration.sql

@@ -0,0 +1,46 @@
+-- Phase 3: move Schedule from per-user to per-License-Key, add weekly support.
+
+-- AlterTable: Schedule gains licenseKeyId + type, userId becomes optional.
+ALTER TABLE "Schedule" ADD COLUMN     "licenseKeyId" TEXT,
+ADD COLUMN     "type" TEXT;
+
+-- AlterTable: Block gains day; new Blocks default dynamicAudio true.
+ALTER TABLE "Block" ADD COLUMN     "day" TEXT;
+ALTER TABLE "Block" ALTER COLUMN "dynamicAudio" SET DEFAULT true;
+
+-- DropIndex: userId is no longer the schedule identity.
+DROP INDEX "Schedule_userId_key";
+
+-- AlterTable: legacy owner becomes optional and non-unique.
+ALTER TABLE "Schedule" ALTER COLUMN "userId" DROP NOT NULL;
+
+-- CreateIndex
+CREATE UNIQUE INDEX "Schedule_licenseKeyId_key" ON "Schedule"("licenseKeyId");
+CREATE INDEX "Schedule_userId_idx" ON "Schedule"("userId");
+
+-- AddForeignKey
+ALTER TABLE "Schedule" ADD CONSTRAINT "Schedule_licenseKeyId_fkey" FOREIGN KEY ("licenseKeyId") REFERENCES "LicenseKey"("id") ON DELETE CASCADE ON UPDATE CASCADE;
+
+-- Backfill: map each existing per-user Schedule to the account's oldest
+-- License Key. Existing content was daily-only.
+UPDATE "Schedule" s
+SET "licenseKeyId" = lk."id",
+    "type" = COALESCE(s."type", 'daily')
+FROM (
+    SELECT DISTINCT ON ("userId") "id", "userId"
+    FROM "LicenseKey"
+    WHERE "userId" IS NOT NULL
+    ORDER BY "userId", "createdAt" ASC, "id" ASC
+) lk
+WHERE s."userId" = lk."userId"
+  AND s."licenseKeyId" IS NULL;
+
+-- Report (do not silently drop) schedules that cannot be mapped to a key.
+DO $$
+DECLARE unmapped integer;
+BEGIN
+    SELECT count(*) INTO unmapped FROM "Schedule" WHERE "licenseKeyId" IS NULL;
+    IF unmapped > 0 THEN
+        RAISE NOTICE 'Phase 3 migration: % Schedule row(s) could not be mapped to a License Key (no owning user/license); retained with licenseKeyId NULL.', unmapped;
+    END IF;
+END $$;