feat(core): add SAML auth request handling endpoints

[darcyYe]

Summary

Add add SAML auth request handling endpoints:

1. GET /api/saml/:samlAppId/authn (resolves LOG-10122)
2. POST /api/saml/:samlAppId/authn (resolves LOG-10121)

To receive single sign on auth requests.

Testing

Tested locally. Can successfully parse SAML login request and init OIDC sign in request to Logto.

Checklist

• .changeset
• unit tests
• integration tests
• necessary TSDoc comments

[github-actions]

COMPARE TO master

Total Size Diff ⚠️ 📈 +19.12 KB

Diff by File

Name	Diff
packages/core/src/constants/index.ts	📈 +84 Bytes
packages/core/src/routes/swagger/utils/operation.ts	📈 +124 Bytes
packages/core/src/saml-applications/libraries/saml-applications.ts	📈 +120 Bytes
packages/core/src/saml-applications/queries/index.ts	📈 +3.4 KB
packages/core/src/saml-applications/queries/sessions.ts	📈 +2.31 KB
packages/core/src/saml-applications/routes/anonymous.ts	📈 +6.6 KB
packages/core/src/saml-applications/routes/utils.test.ts	📈 +692 Bytes
packages/core/src/saml-applications/routes/utils.ts	📈 +2.84 KB
packages/core/src/tenants/Queries.ts	📈 +324 Bytes
packages/phrases/src/locales/en/errors/application.ts	📈 +285 Bytes
packages/phrases/src/locales/en/errors/oidc.ts	📈 +37 Bytes
packages/schemas/alterations/next-1735012422-add-saml-application-sessions-table.ts	📈 +1.64 KB
packages/schemas/src/foundations/jsonb-types/index.ts	📈 +48 Bytes
packages/schemas/src/foundations/jsonb-types/saml-application-sessions.ts	📈 +527 Bytes
packages/schemas/tables/saml_application_sessions.sql	📈 +1.5 KB