chore: add changeset for updating saml_application_sessions table schema (#8055)

Author: darcyYe

.changeset/cyan-buckets-care.md

@@ -0,0 +1,11 @@
+---
+"@logto/core": patch
+"@logto/phrases": patch
+"@logto/schemas": patch
+---
+
+update SAML relay state length and improve error handling
+
+The data type of the `relay_state` column in the `saml_application_sessions` table has been changed from varchar(256) to varchar(512) to accommodate longer Relay State values. For example, when Firebase acts as a Service Provider and initiates a SAML request, the relay state length is approximately 300-400 characters, which previously prevented Firebase from integrating with Logto as an SP before this fix.
+
+Additionally, we have updated the error handling logic in the APIs related to the SAML authentication flow to make error messages more straightforward.

packages/core/src/middleware/koa-slonik-error-handler.ts

@@ -15,7 +15,7 @@ import { DeletionError, InsertionError, UpdateError } from '#src/errors/SlonikEr
 
 /**
  * @remarks
- * We are now upgrading this error handler to simultaneously handle SlonikError and DatabaseError.
+ * We are now upgrading this error handler to handle both SlonikError and DatabaseError.
  * This is because DatabaseError and SlonikError, due to their different sources of definition, are not unified.
  * However, in practice, both are errors triggered by DB query failures.
  */
@@ -44,8 +44,6 @@ export default function koaSlonikErrorHandler<StateT, ContextT>(): Middleware<St
             }
           );
         }
-
-        // TODO: add more DatabaseError code handling if needed.
       }
 
       if (error instanceof InvalidInputError) {