fix(uploads): validation YAML + logging erreurs 5xx détaillé

- Validation syntaxique js-yaml avant import (BadRequestException 400 avec message précis)
- Logger dans UploadsController : log du fichier principal détecté pour multi-upload
- AllExceptionsFilter : log complet avec stack trace pour toutes les erreurs 5xx
- @asyncapi/bundler version corrigée (0.9.0 → ^1.0.1, version inexistante)
- @types/js-yaml ajouté en devDependencies

Generated with [Claude Code](https://claude.ai/code)
via [Happy](https://happy.engineering)

Co-Authored-By: Claude <noreply@anthropic.com>
Co-Authored-By: Happy <yesreply@happy.engineering>

back/package.json

@@ -29,7 +29,8 @@
     "class-validator": "^0.14.0",
     "class-transformer": "^0.5.0",
     "@asyncapi/cli": "6.0.0",
-    "@asyncapi/bundler": "0.9.0",
+    "@asyncapi/bundler": "^1.0.1",
+    "js-yaml": "^4.1.0",
     "@asyncapi/generator": "3.0.1",
     "@asyncapi/html-template": "3.5.6",
     "@redocly/cli": "latest"
@@ -40,6 +41,7 @@
     "@types/express": "^5.0.0",
     "@types/multer": "^1.4.12",
     "@types/node": "^22.0.0",
+    "@types/js-yaml": "^4.0.9",
     "@types/uuid": "^10.0.0",
     "typescript": "^5.7.0",
     "vitest": "^3.0.0"