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/schema.prisma

@@ -28,7 +28,7 @@ model User {
   profiles          Profile[]
   licenseKeys       LicenseKey[]
   userProclamations UserProclamations[]
-  schedule          Schedule?
+  schedules         Schedule[]
 
   @@unique([email])
   @@map("user")
@@ -205,6 +205,7 @@ model LicenseKey {
   userId          String?
   user            User?     @relation(fields: [userId], references: [id], onDelete: SetNull)
   email           String?
+  schedule        Schedule?
   // Human-readable label set only by the Kiosk (e.g. "Living Room"). Trimmed,
   // 1-40 chars. Never a reference or foreign key; the License Key is the only
   // identifier. `systemNameLower` is a case-folded copy used to enforce
@@ -263,31 +264,42 @@ model AuditLog {
   @@map("AuditLog")
 }
 
-// A user's daily listening schedule. Exactly one per user (enforced by the
-// unique userId); contains 0-4 time Blocks. Times are wall-clock minutes from
-// midnight (0-1440), interpreted by the kiosk in the user's configured
-// timezone. The portal never stores a timezone.
+// A listening schedule assigned to one License Key (at most one per key).
+// `type` is "daily" | "weekly" | null (null = no schedule). Times are
+// wall-clock minutes from midnight (0-1440), interpreted by the kiosk in its
+// own configured timezone. The portal never stores a timezone.
+//
+// `userId` is a legacy owner retained while per-user schedules are migrated to
+// per-license-key; new schedules set `licenseKeyId` and leave `userId` null.
 model Schedule {
-  id        String   @id @default(uuid())
-  userId    String   @unique
-  user      User     @relation(fields: [userId], references: [id], onDelete: Cascade)
-  blocks    Block[]
-  createdAt DateTime @default(now())
-  updatedAt DateTime @updatedAt
+  id           String      @id @default(uuid())
+  licenseKeyId String?     @unique
+  licenseKey   LicenseKey? @relation(fields: [licenseKeyId], references: [id], onDelete: Cascade)
+  userId       String?
+  user         User?       @relation(fields: [userId], references: [id], onDelete: Cascade)
+  type         String?
+  blocks       Block[]
+  createdAt    DateTime    @default(now())
+  updatedAt    DateTime    @updatedAt
+
+  @@index([userId])
 }
 
-// A single non-overlapping time range within a Schedule, plus the ordered set
-// of selected Proclamations to play during it. Overnight ranges are disallowed
-// in v1, so startMinutes is always less than endMinutes.
+// A single time range within a Schedule, plus the ordered set of selected
+// Proclamations to play during it. `day` is null for daily schedules and
+// "mon".."sun" for weekly schedules. Overnight (midnight-crossing) ranges are
+// valid: an end clock time before the start belongs to the start day and spills
+// into the next day.
 model Block {
   id            String               @id @default(uuid())
   scheduleId    String
   schedule      Schedule             @relation(fields: [scheduleId], references: [id], onDelete: Cascade)
+  day           String?
   startMinutes  Int
   endMinutes    Int
   // When true, the kiosk enables dynamic audio for the duration of this block,
-  // overriding any audio selections made on the device.
-  dynamicAudio  Boolean              @default(false)
+  // overriding any audio selections made on the device. Portal default: true.
+  dynamicAudio  Boolean              @default(true)
   proclamations BlockProclamations[]
   createdAt     DateTime             @default(now())
   updatedAt     DateTime             @updatedAt