Project settings are now more consistent and easier to manage, with subtasks configurable per project instead of only globally. New and existing projects better inherit expected defaults for timesheets, planning, ratings, and field service options, reducing setup confusion and preventing related configuration errors.

Description of the issue/feature this PR addresses:

Current behavior before PR:

Desired behavior after PR is merged:
 
TaskID: 2146474



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Project setup is now more consistent: features such as subtasks, timesheets, forecasting, and field service settings can default more appropriately and be managed per project where relevant. This reduces duplicate configuration work, improves onboarding clarity, and fixes an issue when enabling worksheets after time and materials.

TaskID: 2146474

Customers can now access their signature requests and signed documents directly from the portal. This makes it easier to find, review, and download completed signature documents without navigating back through internal request screens.

This commit adds support for customer portal access.

In order to implement it, signed needed to be adapted. A related non-stored field reference on the sign.request.item model has been added. It allows one to search for a document name in the portal.
sign.request.item inherits now from portal.mixin model.
 
TaskID: 2061759