refactor(scripts): reorganize scripts/ into seed/ and validate/ subfolders

Move 9 init/seed scripts into scripts/seed/ and 7 validation scripts
(+ validators/ subfolder) into scripts/validate/ to reduce clutter in
the root scripts/ directory. Update all references across Makefile,
CI/CD configs, pre-commit hooks, docs (~40 files), and Python imports.

Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>

docs/archive/PLAN_storefront-module-restructure.md

@@ -47,7 +47,7 @@ Add new rule:
 
 ### Task 1.2: Update validator to check this rule
 
-**File:** `scripts/validate_architecture.py`
+**File:** `scripts/validate/validate_architecture.py`
 
 Add validation for API-007.
 
@@ -340,5 +340,5 @@ After migrated to `app/modules/cart/services/cart_service.py`.
 
 ### Modified Files
 - `app/api/deps.py` (CustomerContext return type)
-- `scripts/validate_architecture.py` (add API-007 check)
+- `scripts/validate/validate_architecture.py` (add API-007 check)
 - All files currently importing from legacy locations

docs/archive/SESSION_NOTE_2026-01-28_module-config-migrations.md

@@ -101,7 +101,7 @@ Committed all pending module migration work:
 Run architecture validator and fix all modules to comply with rules:
 
 ```bash
-python scripts/validate_architecture.py
+python scripts/validate/validate_architecture.py
 ```
 
 Check each module for:

docs/archive/SESSION_NOTE_2026-01-30_self-contained-module-routes.md

@@ -246,7 +246,7 @@ router.include_router({module}_admin_router, tags=["admin-{module}"])
 ## Validation
 
 After each module migration:
-1. Run `python scripts/validate_architecture.py`
+1. Run `python scripts/validate/validate_architecture.py`
 2. Test affected endpoints manually
 3. Verify imports work: `python -c "from app.api.v1.admin import router"`
 

docs/archive/SESSION_NOTE_2026-01-31_tenancy-module-consolidation.md

@@ -142,4 +142,4 @@ Added new rules to enforce module-first architecture:
 - `/docs/architecture/module-system.md`
 - `/docs/development/migration/module-autodiscovery-migration.md`
 - `/.architecture-rules/module.yaml`
-- `/scripts/validate_architecture.py`
+- `/scripts/validate/validate_architecture.py`