refactor: remove obsolete member management API module

apps/web/supabase/migrations/20260417000005_courses_events_bookings_versioning.sql

@@ -0,0 +1,84 @@
+-- =====================================================
+-- Optimistic Locking for Courses, Events, Bookings
+--
+-- Problem: Concurrent edits to courses, events, or bookings
+-- can silently overwrite each other (last write wins).
+--
+-- Fix: Add version column to each table with an auto-
+-- increment trigger on update. API layer checks version
+-- match before writing, preventing silent overwrites.
+--
+-- Reuses the same trigger function pattern established
+-- in 20260416000005_member_versioning.sql but creates a
+-- shared generic function instead of table-specific ones.
+-- =====================================================
+
+-- Shared version increment function (CREATE OR REPLACE is idempotent)
+CREATE OR REPLACE FUNCTION public.increment_version()
+RETURNS trigger
+LANGUAGE plpgsql AS $$
+BEGIN
+  NEW.version := OLD.version + 1;
+  RETURN NEW;
+END;
+$$;
+
+-- -------------------------------------------------------
+-- COURSES
+-- -------------------------------------------------------
+
+ALTER TABLE public.courses
+  ADD COLUMN IF NOT EXISTS version integer NOT NULL DEFAULT 1;
+
+DO $$
+BEGIN
+  IF NOT EXISTS (
+    SELECT 1 FROM pg_trigger WHERE tgname = 'trg_courses_increment_version'
+  ) THEN
+    CREATE TRIGGER trg_courses_increment_version
+      BEFORE UPDATE ON public.courses
+      FOR EACH ROW
+      EXECUTE FUNCTION public.increment_version();
+  END IF;
+END;
+$$;
+
+-- -------------------------------------------------------
+-- EVENTS
+-- -------------------------------------------------------
+
+ALTER TABLE public.events
+  ADD COLUMN IF NOT EXISTS version integer NOT NULL DEFAULT 1;
+
+DO $$
+BEGIN
+  IF NOT EXISTS (
+    SELECT 1 FROM pg_trigger WHERE tgname = 'trg_events_increment_version'
+  ) THEN
+    CREATE TRIGGER trg_events_increment_version
+      BEFORE UPDATE ON public.events
+      FOR EACH ROW
+      EXECUTE FUNCTION public.increment_version();
+  END IF;
+END;
+$$;
+
+-- -------------------------------------------------------
+-- BOOKINGS
+-- -------------------------------------------------------
+
+ALTER TABLE public.bookings
+  ADD COLUMN IF NOT EXISTS version integer NOT NULL DEFAULT 1;
+
+DO $$
+BEGIN
+  IF NOT EXISTS (
+    SELECT 1 FROM pg_trigger WHERE tgname = 'trg_bookings_increment_version'
+  ) THEN
+    CREATE TRIGGER trg_bookings_increment_version
+      BEFORE UPDATE ON public.bookings
+      FOR EACH ROW
+      EXECUTE FUNCTION public.increment_version();
+  END IF;
+END;
+$$;