feat(HRT-80): API Token personnel + Webhook alertes (Pro)
- Nouveaux fichiers: api_tokens_db.py, api_v1/routes/user_tokens.py, api_v1/utils_webhook.py
- Migration DB idempotente: tables user_api_tokens + user_webhooks
- Endpoints POST/DELETE /api/v1/user/api-token (Pro only)
- Endpoints POST/DELETE /api/v1/user/webhook (Pro only, HTTPS requis)
- HMAC-SHA256 fire-and-forget dispatch webhook
- auth.py: validate_api_key() + X-API-Key fallback dans jwt_required_middleware
- saas_auth.py: import logging au niveau module, validate_api_key(), X-API-Key fallback
- api_v1/__init__.py: enregistrement user_tokens_bp
- 24 tests pytest — tous passent
Co-Authored-By: Paperclip <noreply@paperclip.ing>
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