* chore(auth): add error logging for saml-idp silent failures * chore(auth): add warn-level logging for saml-idp silent failures * chore(auth): change 'No user found' log to warn level * chore(auth): add warn-level logging for silent auth failures - saml-idp authorize: credentials, code, token, userInfo, user lookup - callbacks:signIn: account type, email, name, catch-all - callbacks:jwt: unknown account type (info → warn) - saml:profile: missing email from IdP - getServerSession: user not found for valid token