BUG: Session schema truncates long list of scopes.

[jhardin-accumula]

Issue summary

Getting this error:

Failed to save session to database: SQLSTATE[22001]: String data, right truncated: 7 ERROR: value too long for type character varying(255)

The list of scopes being saved is:

read_locations,read_price_rules,read_product_listings,write_assigned_fulfillment_orders,write_customers,write_draft_orders,write_fulfillments,write_inventory,write_merchant_managed_fulfillment_orders,write_order_edits,write_orders,write_products,write_returns,write_third_party_fulfillment_orders

...which is 296 characters.

Adding this migration to fix, appears to work:

        Schema::table('sessions', function (Blueprint $table) {
            $table->text('scope')->nullable()->change();  // Don't impose a length limit
        });

Expected behavior

Session should save the scope list however long it is.

Actual behavior

Failed to save session to database: SQLSTATE[22001]: String data, right truncated: 7 ERROR: value too long for type character varying(255)

Steps to reproduce the problem

1. Put a long list of scopes (> 255 chars) in your TOML and deploy
2. Attempt to use the app
3. Get 500 error, SQL truncation error in log

NOTE: This issue probably applies to other app templates as well. They should be reviewed.