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- Delete bin/scheduler-run.php (fully superseded by bin/console scheduler:run)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>

bin/module-deactivate.php

@@ -37,20 +37,10 @@ function moduleDeactivateRun(): int
         }
 
         $projectRoot = moduleCliProjectRoot();
-        $manifestFile = $projectRoot . '/modules/' . $moduleId . '/module.php';
-
-        if (!is_file($manifestFile)) {
-            fwrite(STDERR, "Error: module manifest not found at {$manifestFile}\n");
-            return 1;
-        }
-
-        $raw = require $manifestFile;
-        if (!is_array($raw)) {
-            fwrite(STDERR, "Error: manifest must return an array.\n");
-            return 1;
-        }
-
-        $manifest = \MintyPHP\App\Module\ModuleManifest::fromArray($raw, dirname($manifestFile));
+        $manifest = \MintyPHP\App\Module\ModuleManifestLoader::loadFromDisk(
+            $projectRoot . '/modules',
+            $moduleId
+        );
 
         $handlerClass = $manifest->deactivationHandler;
         if ($handlerClass === null) {