feat(db): add platform notification models and relations

Add PlatformNotification and PlatformNotificationInteraction Prisma models,
including enums PlatformNotificationSurface and PlatformNotificationScope,
indexes, timestamps, and fields for scoping (user, project, organization),
lifecycle (startsAt, endsAt, archivedAt) and delivery behavior (CLI-specific
fields, priority). Wire new relations into User, Organization, Project,
OrgMember and Workspace models so notifications and interactions can be
queried from those entities.

Add SQL migration to create the new enums and adjust schema constraints and
indexes required for the migration. The change enables admin-created,
scoped platform notifications with per-user interaction tracking for both
webapp and CLI surfaces.

Author: 0ski

internal-packages/database/prisma/migrations/20260223123615_add_platform_notification_tables/migration.sql

@@ -0,0 +1,67 @@
+-- CreateEnum
+CREATE TYPE "public"."PlatformNotificationSurface" AS ENUM ('WEBAPP', 'CLI');
+
+-- CreateEnum
+CREATE TYPE "public"."PlatformNotificationScope" AS ENUM ('USER', 'PROJECT', 'ORGANIZATION', 'GLOBAL');
+
+-- CreateTable
+CREATE TABLE "public"."PlatformNotification" (
+    "id" TEXT NOT NULL,
+    "friendlyId" TEXT NOT NULL,
+    "title" TEXT NOT NULL,
+    "payload" JSONB NOT NULL,
+    "surface" "public"."PlatformNotificationSurface" NOT NULL,
+    "scope" "public"."PlatformNotificationScope" NOT NULL,
+    "userId" TEXT,
+    "organizationId" TEXT,
+    "projectId" TEXT,
+    "startsAt" TIMESTAMP(3) NOT NULL,
+    "endsAt" TIMESTAMP(3),
+    "cliMaxDaysAfterFirstSeen" INTEGER,
+    "cliMaxShowCount" INTEGER,
+    "priority" INTEGER NOT NULL DEFAULT 0,
+    "archivedAt" TIMESTAMP(3),
+    "createdAt" TIMESTAMP(3) NOT NULL DEFAULT CURRENT_TIMESTAMP,
+    "updatedAt" TIMESTAMP(3) NOT NULL,
+
+    CONSTRAINT "PlatformNotification_pkey" PRIMARY KEY ("id")
+);
+
+-- CreateTable
+CREATE TABLE "public"."PlatformNotificationInteraction" (
+    "id" TEXT NOT NULL,
+    "notificationId" TEXT NOT NULL,
+    "userId" TEXT NOT NULL,
+    "firstSeenAt" TIMESTAMP(3) NOT NULL DEFAULT CURRENT_TIMESTAMP,
+    "showCount" INTEGER NOT NULL DEFAULT 1,
+    "webappDismissedAt" TIMESTAMP(3),
+    "cliDismissedAt" TIMESTAMP(3),
+    "createdAt" TIMESTAMP(3) NOT NULL DEFAULT CURRENT_TIMESTAMP,
+    "updatedAt" TIMESTAMP(3) NOT NULL,
+
+    CONSTRAINT "PlatformNotificationInteraction_pkey" PRIMARY KEY ("id")
+);
+
+-- CreateIndex
+CREATE UNIQUE INDEX "PlatformNotification_friendlyId_key" ON "public"."PlatformNotification"("friendlyId");
+
+-- CreateIndex
+CREATE INDEX "PlatformNotification_surface_scope_startsAt_idx" ON "public"."PlatformNotification"("surface", "scope", "startsAt");
+
+-- CreateIndex
+CREATE UNIQUE INDEX "PlatformNotificationInteraction_notificationId_userId_key" ON "public"."PlatformNotificationInteraction"("notificationId", "userId");
+
+-- AddForeignKey
+ALTER TABLE "public"."PlatformNotification" ADD CONSTRAINT "PlatformNotification_userId_fkey" FOREIGN KEY ("userId") REFERENCES "public"."User"("id") ON DELETE CASCADE ON UPDATE CASCADE;
+
+-- AddForeignKey
+ALTER TABLE "public"."PlatformNotification" ADD CONSTRAINT "PlatformNotification_organizationId_fkey" FOREIGN KEY ("organizationId") REFERENCES "public"."Organization"("id") ON DELETE CASCADE ON UPDATE CASCADE;
+
+-- AddForeignKey
+ALTER TABLE "public"."PlatformNotification" ADD CONSTRAINT "PlatformNotification_projectId_fkey" FOREIGN KEY ("projectId") REFERENCES "public"."Project"("id") ON DELETE CASCADE ON UPDATE CASCADE;
+
+-- AddForeignKey
+ALTER TABLE "public"."PlatformNotificationInteraction" ADD CONSTRAINT "PlatformNotificationInteraction_notificationId_fkey" FOREIGN KEY ("notificationId") REFERENCES "public"."PlatformNotification"("id") ON DELETE CASCADE ON UPDATE CASCADE;
+
+-- AddForeignKey
+ALTER TABLE "public"."PlatformNotificationInteraction" ADD CONSTRAINT "PlatformNotificationInteraction_userId_fkey" FOREIGN KEY ("userId") REFERENCES "public"."User"("id") ON DELETE CASCADE ON UPDATE CASCADE;

internal-packages/database/prisma/schema.prisma

@@ -65,6 +65,9 @@ model User {
   impersonationsReceived  ImpersonationAuditLog[] @relation("ImpersonationTarget")
   customerQueries         CustomerQuery[]
   metricsDashboards       MetricsDashboard[]
+
+  platformNotifications            PlatformNotification[]
+  platformNotificationInteractions PlatformNotificationInteraction[]
 }
 
 model MfaBackupCode {
@@ -228,6 +231,8 @@ model Organization {
   githubAppInstallations   GithubAppInstallation[]
   customerQueries          CustomerQuery[]
   metricsDashboards        MetricsDashboard[]
+
+  platformNotifications            PlatformNotification[]
 }
 
 model OrgMember {
@@ -417,6 +422,8 @@ model Project {
   onboardingData        Json?
   taskScheduleInstances TaskScheduleInstance[]
   metricsDashboards     MetricsDashboard[]
+
+  platformNotifications PlatformNotification[]
 }
 
 enum ProjectVersion {
@@ -2577,3 +2584,96 @@ model MetricsDashboard {
   /// Fast lookup for the list
   @@index([projectId, createdAt(sort: Desc)])
 }
+
+enum PlatformNotificationSurface {
+  WEBAPP
+  CLI
+}
+
+enum PlatformNotificationScope {
+  USER
+  PROJECT
+  ORGANIZATION
+  GLOBAL
+}
+
+/// Admin-created notification definitions
+model PlatformNotification {
+  id String @id @default(cuid())
+
+  friendlyId String @unique @default(cuid())
+
+  /// Admin-facing title for identification in admin tools
+  title String
+
+  /// Versioned JSON rendering content (see payload schema in spec)
+  payload Json
+
+  surface PlatformNotificationSurface
+  scope   PlatformNotificationScope
+
+  /// Set when scope = USER
+  user   User?   @relation(fields: [userId], references: [id], onDelete: Cascade, onUpdate: Cascade)
+  userId String?
+
+  /// Set when scope = ORGANIZATION
+  organization   Organization? @relation(fields: [organizationId], references: [id], onDelete: Cascade, onUpdate: Cascade)
+  organizationId String?
+
+  /// Set when scope = PROJECT
+  project   Project? @relation(fields: [projectId], references: [id], onDelete: Cascade, onUpdate: Cascade)
+  projectId String?
+
+  /// When notification becomes active
+  startsAt DateTime
+
+  /// When notification expires. Null = persists until dismissed or archived
+  endsAt DateTime?
+
+  /// CLI: auto-expire N days after user first saw it
+  cliMaxDaysAfterFirstSeen Int?
+
+  /// CLI: auto-expire after shown N times to user
+  cliMaxShowCount Int?
+
+  /// Ordering within same scope level (higher = more important)
+  priority Int @default(0)
+
+  /// Soft delete
+  archivedAt DateTime?
+
+  createdAt DateTime @default(now())
+  updatedAt DateTime @updatedAt
+
+  interactions PlatformNotificationInteraction[]
+
+  @@index([surface, scope, startsAt])
+}
+
+/// Per-user tracking of notification views and dismissals
+model PlatformNotificationInteraction {
+  id String @id @default(cuid())
+
+  notification   PlatformNotification @relation(fields: [notificationId], references: [id], onDelete: Cascade, onUpdate: Cascade)
+  notificationId String
+
+  user   User   @relation(fields: [userId], references: [id], onDelete: Cascade, onUpdate: Cascade)
+  userId String
+
+  /// Set by beacon/CLI GET on first impression
+  firstSeenAt DateTime @default(now())
+
+  /// Times shown (incremented per beacon/CLI view)
+  showCount Int @default(1)
+
+  /// User dismissed in webapp
+  webappDismissedAt DateTime?
+
+  /// Auto-dismissed or expired in CLI
+  cliDismissedAt DateTime?
+
+  createdAt DateTime @default(now())
+  updatedAt DateTime @updatedAt
+
+  @@unique([notificationId, userId])
+}