feat: schema for logistics hotels + flight tracking

Adds 2 new models for grand-finale logistics PR 2:
- Hotel: 1:1 with Program (one per edition); name + address + link + notes
- FlightDetail: 1:1 with AttendingMember; arrival + departure datetimes,
  flight numbers, airports, admin status (PENDING/CONFIRMED), admin notes

Migration is purely additive: no DROP/ALTER COLUMN/RENAME. FKs point
FROM new tables TO existing tables (Program, AttendingMember) with
ON DELETE CASCADE only firing on parent deletion.

prisma/migrations/20260428161639_add_logistics_models/migration.sql

@@ -0,0 +1,49 @@
+-- CreateEnum
+CREATE TYPE "FlightDetailStatus" AS ENUM ('PENDING', 'CONFIRMED');
+
+-- CreateTable
+CREATE TABLE "Hotel" (
+    "id" TEXT NOT NULL,
+    "programId" TEXT NOT NULL,
+    "name" TEXT NOT NULL,
+    "address" TEXT,
+    "link" TEXT,
+    "notes" TEXT,
+    "createdAt" TIMESTAMP(3) NOT NULL DEFAULT CURRENT_TIMESTAMP,
+    "updatedAt" TIMESTAMP(3) NOT NULL,
+
+    CONSTRAINT "Hotel_pkey" PRIMARY KEY ("id")
+);
+
+-- CreateTable
+CREATE TABLE "FlightDetail" (
+    "id" TEXT NOT NULL,
+    "attendingMemberId" TEXT NOT NULL,
+    "arrivalAt" TIMESTAMP(3),
+    "arrivalFlightNumber" TEXT,
+    "arrivalAirport" TEXT,
+    "departureAt" TIMESTAMP(3),
+    "departureFlightNumber" TEXT,
+    "departureAirport" TEXT,
+    "status" "FlightDetailStatus" NOT NULL DEFAULT 'PENDING',
+    "adminNotes" TEXT,
+    "createdAt" TIMESTAMP(3) NOT NULL DEFAULT CURRENT_TIMESTAMP,
+    "updatedAt" TIMESTAMP(3) NOT NULL,
+
+    CONSTRAINT "FlightDetail_pkey" PRIMARY KEY ("id")
+);
+
+-- CreateIndex
+CREATE UNIQUE INDEX "Hotel_programId_key" ON "Hotel"("programId");
+
+-- CreateIndex
+CREATE UNIQUE INDEX "FlightDetail_attendingMemberId_key" ON "FlightDetail"("attendingMemberId");
+
+-- CreateIndex
+CREATE INDEX "FlightDetail_status_idx" ON "FlightDetail"("status");
+
+-- AddForeignKey
+ALTER TABLE "Hotel" ADD CONSTRAINT "Hotel_programId_fkey" FOREIGN KEY ("programId") REFERENCES "Program"("id") ON DELETE CASCADE ON UPDATE CASCADE;
+
+-- AddForeignKey
+ALTER TABLE "FlightDetail" ADD CONSTRAINT "FlightDetail_attendingMemberId_fkey" FOREIGN KEY ("attendingMemberId") REFERENCES "AttendingMember"("id") ON DELETE CASCADE ON UPDATE CASCADE;