Fix CLAUDE.md rules — tenant table is 'academies' not 'organizations'

This was the root cause of repeated migration FK failures in production.
Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>

.claude/rules/01-migration-first.md

@@ -20,7 +20,7 @@ globs: ["database/migrations/**", "app/Domain/**/Models/**", "app/Models/**"]
 - Money: `bigInteger` (piasters, not pounds, not decimal)
 - Status/type: `string(30)` with CHECK constraint via `DB::statement()`
 - JSONB: `->default('{}')` or `->default('[]')` — never nullable
-- Every tenant table has `$table->foreignId('academy_id')->constrained('organizations')`
+- Every tenant table has `$table->foreignId('academy_id')->constrained('academies')`
 - Every public entity has `$table->uuid('uuid')->unique()`
 - Soft-deletable entities have `$table->softDeletes()`
 - User-created entities have `$table->foreignId('created_by')->constrained('users')`

.claude/rules/02-multi-tenancy.md

@@ -13,7 +13,7 @@ Every domain model (except Organization itself) MUST use the `BelongsToAcademy`
 
 ## Tables WITHOUT academy_id (exhaustive list)
 
-- `organizations` (IS the tenant)
+- `academies` (IS the tenant)
 - `migrations`, `jobs`, `failed_jobs`, `cache`, `sessions`, `password_reset_tokens`
 - `permissions` (shared definitions)