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>

scripts/validate/validators/__init__.py

@@ -0,0 +1,36 @@
+# scripts/validators/__init__.py
+"""
+Architecture Validators Package
+===============================
+
+This package contains domain-specific validators for the architecture validation system.
+Each validator module handles a specific category of rules.
+
+Modules:
+    - base: Base classes and helpers (Severity, Violation, ValidationResult)
+    - api_validator: API endpoint rules (API-*)
+    - service_validator: Service layer rules (SVC-*)
+    - model_validator: Model rules (MDL-*)
+    - exception_validator: Exception handling rules (EXC-*)
+    - naming_validator: Naming convention rules (NAM-*)
+    - auth_validator: Auth and multi-tenancy rules (AUTH-*, MT-*)
+    - middleware_validator: Middleware rules (MDW-*)
+    - frontend_validator: Frontend rules (JS-*, TPL-*, FE-*, CSS-*)
+    - language_validator: Language/i18n rules (LANG-*)
+"""
+
+from .base import (
+    BaseValidator,
+    FileResult,
+    Severity,
+    ValidationResult,
+    Violation,
+)
+
+__all__ = [
+    "Severity",
+    "Violation",
+    "FileResult",
+    "ValidationResult",
+    "BaseValidator",
+]