Comprehensive Audit Logging & OIDC Brand Icons

Major expansion of the audit trail system covering all critical platform actions for GDPR/SOC2 compliance, OIDC provider brand icons, and fixes for date formatting localization and data availability routing.

Audit logging for log access, auth events, identity management, provider config, settings, and sessions
OIDC login page shows brand icons for well-known providers (Google, Microsoft, GitHub, GitLab, Okta, Auth0, Keycloak, Authentik)
Backend auto-detects OIDC provider icon from issuer URL
Date/number formatting now respects user's browser/system locale
Fixed data-availability endpoint for ClickHouse and MongoDB storage engines

Added

Comprehensive Audit Logging: major expansion of the audit trail system to cover all critical platform actions for improved compliance (GDPR/SOC2) and security monitoring.
- Log Access Auditing: every log search, trace view, context lookup, single log detail view, and live stream connection is now recorded with user identity, IP address, and query parameters.
- External Authentication Auditing: successful logins via OIDC and LDAP providers are now tracked, including new user registration events.
- Identity Management Auditing: linking and unlinking of external identities (Google, GitHub, LDAP, etc.) to user accounts is now recorded.
- Authentication Provider Auditing: all administrative actions on auth providers (create, update, delete, reorder) are now fully audited with configuration change summaries.
- System Settings Auditing: any changes to global platform settings (auth mode, signup status, default users) are now tracked with before/after metadata.
- Session Auditing: viewing of active session lists and individual session event timelines is now recorded.
- Audit metadata now includes detailed context like search queries (q), filter parameters, and updated keys for configuration changes.
OIDC login page now shows brand icons for well-known providers (Google, Microsoft/Azure, GitHub, GitLab, Okta, Auth0, Keycloak, Authentik); unknown providers fall back to the generic icon
Backend auto-detects the provider icon from the issuer URL when creating or updating an OIDC provider, with name/slug matching as fallback for self-hosted setups

Fixed

Date and number formatting localization: removed hardcoded locales (it-IT, en-US) from the frontend (SIEM, Search, Admin, etc.) to ensure the application automatically respects the user’s browser/system language settings.
GET /api/v1/projects/data-availability returned logs: [] (and incorrect traces/metrics) when STORAGE_ENGINE=clickhouse or mongodb; the endpoint now routes all three checks through the reservoir so they hit the correct backend

All releases