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/src/db/seed.ts

@@ -7,7 +7,7 @@ const DEV_LOCATION_ID = '00000000-0000-0000-0000-000000000010'
 
 async function seed() {
   const connectionString =
-    process.env.DATABASE_URL ?? 'postgresql://forte:forte@localhost:5432/forte'
+    process.env.DATABASE_URL ?? 'postgresql://lunarfront:lunarfront@localhost:5432/lunarfront'
   const sql = postgres(connectionString)
   const db = drizzle(sql)
 
@@ -17,7 +17,7 @@ async function seed() {
     .insert(companies)
     .values({
       id: DEV_COMPANY_ID,
-      name: 'Dev Music Co.',
+      name: 'Dev Store',
       timezone: 'America/Chicago',
     })
     .onConflictDoNothing()