Introduce a dedicated `audit` log channel (daily rotation, configurable retention via
LOG_AUDIT_DAYS) and a small `auditLog()` / `auditLogWebhookFailure()` helper used to
record state-changing API operations and webhook events.
Instrumented:
- API mutation endpoints (create / update / delete / start / stop / restart) across
applications, services, databases (incl. backups, env vars, storage), servers,
projects + environments, scheduled tasks, private keys, GitHub apps, cloud provider
tokens, Hetzner server provisioning, instance enable/disable.
- Webhook signature verification outcomes for GitHub, GitLab, Bitbucket, Gitea and
Stripe, plus the Sentinel push endpoint.
- Authentication and authorization outcomes via the global exception handler and
the `ApiAbility` middleware (unauthenticated, ability-denied, policy-denied).
The helper is wrapped in try/catch so logging failures never affect the request
path. Successful operations log at `info`; suspicious/denied requests log at
`warning`. Operators wanting a failures-only feed can set `LOG_AUDIT_LEVEL=warning`.
Includes a feature test suite covering the helper, the webhook providers and the
new auth/authorization log paths.
Co-Authored-By: Claude Opus 4.7 <noreply@anthropic.com>
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