feat: rebrand to Domain Scanner platform

Replace GeoExport static site with Next.js domain intelligence app:
real DNS/WHOIS/SSL/HTTP/geo scans, SSE progress, Docker stack,
updated install/uninstall scripts, and full documentation.

Co-authored-by: Cursor <cursoragent@cursor.com>

prisma/schema.prisma

@@ -0,0 +1,83 @@
+generator client {
+  provider = "prisma-client-js"
+}
+
+datasource db {
+  provider = "postgresql"
+  url      = env("DATABASE_URL")
+}
+
+enum Role {
+  USER
+  ADMIN
+}
+
+enum ScanStatus {
+  PENDING
+  RUNNING
+  COMPLETED
+  FAILED
+}
+
+enum MonitorType {
+  DNS
+  SSL
+  UPTIME
+}
+
+model User {
+  id           String    @id @default(cuid())
+  email        String    @unique
+  name         String?
+  passwordHash String
+  role         Role      @default(USER)
+  createdAt    DateTime  @default(now())
+  updatedAt    DateTime  @updatedAt
+  scans        Scan[]
+  monitors     Monitor[]
+}
+
+model Scan {
+  id        String     @id @default(cuid())
+  domain    String
+  status    ScanStatus @default(PENDING)
+  progress  Int        @default(0)
+  result    Json?
+  error     String?
+  userId    String?
+  user      User?      @relation(fields: [userId], references: [id], onDelete: SetNull)
+  ip        String?
+  userAgent String?
+  createdAt DateTime   @default(now())
+  updatedAt DateTime   @updatedAt
+
+  @@index([domain])
+  @@index([createdAt])
+  @@map("scans")
+}
+
+model Monitor {
+  id          String      @id @default(cuid())
+  domain      String
+  type        MonitorType
+  enabled     Boolean     @default(true)
+  lastChecked DateTime?
+  lastResult  Json?
+  userId      String
+  user        User        @relation(fields: [userId], references: [id], onDelete: Cascade)
+  createdAt   DateTime    @default(now())
+  updatedAt   DateTime    @updatedAt
+
+  @@index([userId])
+  @@map("monitors")
+}
+
+model ApiRateLimit {
+  id        String   @id @default(cuid())
+  key       String   @unique
+  count     Int      @default(0)
+  windowEnd DateTime
+  updatedAt DateTime @updatedAt
+
+  @@map("api_rate_limits")
+}