feat(backend): add standalone data plane

Replace the Supabase application data plane with the Node/PostgreSQL API, migrate mobile, admin, web, and MCP callers, add controlled cutover tooling, and define hardened Dokploy infrastructure.

apps/api/src/db/schema.ts

@@ -0,0 +1,32 @@
+import { boolean, index, integer, jsonb, pgTable, primaryKey, text, timestamp, uuid } from 'drizzle-orm/pg-core';
+
+export const profiles = pgTable('profiles', {
+  id: uuid('id').primaryKey(),
+  name: text('name'),
+  email: text('email'),
+  avatarUrl: text('avatar_url'),
+  pushToken: text('push_token'),
+  isPremium: boolean('is_premium').notNull().default(false),
+  coupleId: uuid('couple_id'),
+  gender: text('gender').$type<'male' | 'female' | 'non-binary' | 'prefer-not-to-say' | null>(),
+  showExplicitContent: boolean('show_explicit_content').notNull().default(true),
+  maxIntensity: integer('max_intensity').notNull().default(5),
+  publicKeyJwk: jsonb('public_key_jwk').$type<Record<string, unknown> | null>(),
+  hideNsfw: boolean('hide_nsfw').notNull().default(false),
+  onboardingCompleted: boolean('onboarding_completed').notNull().default(false),
+  onboardingVersion: integer('onboarding_version').notNull().default(0),
+  authSyncedAt: timestamp('auth_synced_at', { withTimezone: true }).notNull().defaultNow(),
+  createdAt: timestamp('created_at', { withTimezone: true }).notNull().defaultNow(),
+  updatedAt: timestamp('updated_at', { withTimezone: true }).notNull().defaultNow(),
+}, (table) => [index('profiles_couple_id_idx').on(table.coupleId)]);
+
+export const featureInterests = pgTable('feature_interests', {
+  userId: uuid('user_id').notNull().references(() => profiles.id, { onDelete: 'cascade' }),
+  feature: text('feature').notNull(),
+  createdAt: timestamp('created_at', { withTimezone: true }).notNull().defaultNow(),
+}, (table) => [
+  primaryKey({ columns: [table.userId, table.feature] }),
+  index('feature_interests_feature_idx').on(table.feature),
+]);
+
+export type ProfileRow = typeof profiles.$inferSelect;