v0.55.14

Added

• OIDC/SSO single sign-on support via any OpenID Connect provider (Authentik, Keycloak, Google, etc.), configurable through four environment variables (OIDC_ISSUER, OIDC_CLIENT_ID, OIDC_CLIENT_SECRET, OIDC_REDIRECT_URI).
• Authorization Code flow with PKCE (S256) and nonce for secure SSO; state, nonce, and code verifier are stored in the session and consumed once.
• Login page shows an "Sign in with SSO" button only when OIDC is configured; displays a localised error message on failed SSO attempts.
• Database migration v42 adds oidc_sub and oidc_provider columns to the users table with a partial unique index.
• SSO i18n keys (loginWithSso, orDivider, ssoError) added to all 16 supported locales.