Rename Forte to LunarFront, generalize for any small business

Rebrand from Forte (music-store-specific) to LunarFront (any small business):
- Package namespace @forte/* → @lunarfront/*
- Database forte/forte_test → lunarfront/lunarfront_test
- Docker containers, volumes, connection strings
- UI branding, localStorage keys, test emails
- All documentation and planning docs

Generalize music-specific terminology:
- instrumentDescription → itemDescription
- instrumentCount → itemCount
- instrumentType → itemCategory (on service templates)
- New migration 0027_generalize_terminology for column renames
- Seed data updated with generic examples
- RBAC descriptions updated

packages/backend/api-tests/suites/webdav.ts

@@ -27,7 +27,7 @@ async function dav(
 
 suite('WebDAV', { tags: ['webdav', 'storage'] }, (t) => {
   // Use the same test user created by the test runner
-  const email = 'test@forte.dev'
+  const email = 'test@lunarfront.dev'
   const password = 'testpassword1234'
   const basicAuth = 'Basic ' + Buffer.from(`${email}:${password}`).toString('base64')
   const badAuth = 'Basic ' + Buffer.from(`${email}:wrongpassword`).toString('base64')