feat: Implement multi-tenancy with default organization, global courses, user profiles, and new UI components like OrganizationSelector and Combobox.

services/cms-service/migrations/20260116000010_update_fn_register_user.sql

@@ -0,0 +1,30 @@
+-- Migration: Update fn_register_user to handle default organization
+-- Assigns users to the 'Default Organization' (0...1) if no name is provided.
+
+CREATE OR REPLACE FUNCTION fn_register_user(
+    p_email VARCHAR(255),
+    p_password_hash VARCHAR(255),
+    p_full_name VARCHAR(255),
+    p_role VARCHAR(50),
+    p_org_name VARCHAR(255) DEFAULT NULL
+) RETURNS SETOF users AS $$
+DECLARE
+    v_org_id UUID;
+BEGIN
+    -- Find or create organization
+    IF p_org_name IS NULL OR p_org_name = '' OR p_org_name = 'Default Organization' THEN
+        v_org_id := '00000000-0000-0000-0000-000000000001';
+    ELSE
+        INSERT INTO organizations (name) 
+        VALUES (p_org_name) 
+        ON CONFLICT (name) DO UPDATE SET name = EXCLUDED.name 
+        RETURNING id INTO v_org_id;
+    END IF;
+
+    -- Create user
+    RETURN QUERY
+    INSERT INTO users (email, password_hash, full_name, role, organization_id)
+    VALUES (p_email, p_password_hash, p_full_name, p_role, v_org_id)
+    RETURNING *;
+END;
+$$ LANGUAGE plpgsql;