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/0005_profile_settings.sql

@@ -0,0 +1,35 @@
+ALTER TABLE profiles
+  ADD COLUMN IF NOT EXISTS usage_reason text,
+  ADD COLUMN IF NOT EXISTS last_active_at timestamptz;
+--> statement-breakpoint
+CREATE TABLE IF NOT EXISTS notification_preferences (
+  user_id uuid PRIMARY KEY REFERENCES profiles(id) ON DELETE CASCADE,
+  matches_enabled boolean NOT NULL DEFAULT true,
+  messages_enabled boolean NOT NULL DEFAULT true,
+  partner_activity_enabled boolean NOT NULL DEFAULT true,
+  nudges_enabled boolean NOT NULL DEFAULT true,
+  pack_changes_enabled boolean NOT NULL DEFAULT true,
+  new_packs_enabled boolean NOT NULL DEFAULT true,
+  streak_milestones_enabled boolean NOT NULL DEFAULT true,
+  weekly_summary_enabled boolean NOT NULL DEFAULT true,
+  unpaired_reminders_enabled boolean NOT NULL DEFAULT true,
+  catchup_reminders_enabled boolean NOT NULL DEFAULT true,
+  created_at timestamptz NOT NULL DEFAULT now(),
+  updated_at timestamptz NOT NULL DEFAULT now()
+);
+--> statement-breakpoint
+CREATE TABLE IF NOT EXISTS feedback (
+  id uuid PRIMARY KEY,
+  user_id uuid NOT NULL REFERENCES profiles(id) ON DELETE CASCADE,
+  type text NOT NULL CHECK (type IN ('bug', 'feature_request', 'general', 'question')),
+  title text NOT NULL,
+  description text NOT NULL,
+  device_info jsonb NOT NULL DEFAULT '{}'::jsonb,
+  status text NOT NULL DEFAULT 'new' CHECK (status IN ('new', 'reviewed', 'in_progress', 'resolved', 'closed')),
+  question_id uuid,
+  created_at timestamptz NOT NULL DEFAULT now(),
+  updated_at timestamptz NOT NULL DEFAULT now()
+);
+--> statement-breakpoint
+CREATE INDEX IF NOT EXISTS feedback_user_id_idx ON feedback(user_id);
+