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/drizzle/0000_identity_and_feature_interests.sql

@@ -0,0 +1,35 @@
+CREATE TABLE "profiles" (
+  "id" uuid PRIMARY KEY NOT NULL,
+  "name" text,
+  "email" text,
+  "avatar_url" text,
+  "push_token" text,
+  "is_premium" boolean DEFAULT false NOT NULL,
+  "couple_id" uuid,
+  "gender" text,
+  "show_explicit_content" boolean DEFAULT true NOT NULL,
+  "max_intensity" integer DEFAULT 5 NOT NULL,
+  "public_key_jwk" jsonb,
+  "hide_nsfw" boolean DEFAULT false NOT NULL,
+  "onboarding_completed" boolean DEFAULT false NOT NULL,
+  "onboarding_version" integer DEFAULT 0 NOT NULL,
+  "auth_synced_at" timestamp with time zone DEFAULT now() NOT NULL,
+  "created_at" timestamp with time zone DEFAULT now() NOT NULL,
+  "updated_at" timestamp with time zone DEFAULT now() NOT NULL,
+  CONSTRAINT "profiles_gender_check" CHECK ("gender" IS NULL OR "gender" IN ('male', 'female', 'non-binary', 'prefer-not-to-say')),
+  CONSTRAINT "profiles_max_intensity_check" CHECK ("max_intensity" BETWEEN 1 AND 5)
+);
+--> statement-breakpoint
+CREATE INDEX "profiles_couple_id_idx" ON "profiles" USING btree ("couple_id");
+--> statement-breakpoint
+CREATE TABLE "feature_interests" (
+  "user_id" uuid NOT NULL,
+  "feature" text NOT NULL,
+  "created_at" timestamp with time zone DEFAULT now() NOT NULL,
+  CONSTRAINT "feature_interests_user_id_feature_pk" PRIMARY KEY("user_id", "feature")
+);
+--> statement-breakpoint
+ALTER TABLE "feature_interests" ADD CONSTRAINT "feature_interests_user_id_profiles_id_fk"
+  FOREIGN KEY ("user_id") REFERENCES "profiles"("id") ON DELETE cascade;
+--> statement-breakpoint
+CREATE INDEX "feature_interests_feature_idx" ON "feature_interests" USING btree ("feature");