refactor: extract shared code from bin/ scripts and remove legacy scheduler runner

- Extract ModuleManifestLoader for standalone manifest loading (used by
  module-deactivate and ValidateCommand)
- Extract SqlStatementParser, ModuleMigrationRepository, and
  ModuleMigrationService from bin/module-migrate.php to enforce strict
  layering (SQL in repository, orchestration in service)
- Delete bin/scheduler-run.php (fully superseded by bin/console scheduler:run)
- Update docs and test fixtures to reference bin/console

Co-Authored-By: Claude Opus 4.6 (1M context) <noreply@anthropic.com>

lib/Repository/Module/ModuleMigrationRepositoryInterface.php

@@ -0,0 +1,24 @@
+<?php
+
+namespace MintyPHP\Repository\Module;
+
+/** Contract for module migration tracking: table creation, applied-file queries, and statement execution. */
+interface ModuleMigrationRepositoryInterface
+{
+    public function ensureTrackingTable(): void;
+
+    /**
+     * @return array<string, true>
+     */
+    public function getAppliedFilenames(string $moduleId): array;
+
+    public function recordApplied(string $moduleId, string $filename): void;
+
+    public function beginTransaction(): void;
+
+    public function commit(): void;
+
+    public function rollback(): void;
+
+    public function executeStatement(string $sql): void;
+}