Enable Programmatic Extension of Content Fragment GraphQL Schema in AEM

[#1]

Request for Feature Enhancement (RFE) Summary:	Enable the ability to add custom fields to the Content Fragment GraphQL schema via code, SlingDataFetcher, or programmatic means, without requiring changes to the Content Fragment Model definition in AEM.
Use-case:	Developers and integrators need to expose computed, derived, or integration-specific fields in the Content Fragment GraphQL API for headless delivery, without modifying the underlying Content Fragment Model.
Current/Experienced Behavior:	The Content Fragment GraphQL schema is auto-generated from the Content Fragment Model and system fields. It is not possible to add custom fields via code, SlingDataFetcher, or other programmatic approaches.
Business Impact	Limits flexibility for headless integrations, increases maintenance overhead, and requires model changes for every new field, which may not be feasible or desirable in large organizations or for computed/integration fields.
Improved/Expected Behavior:	Ability to programmatically extend the Content Fragment GraphQL schema with custom fields (e.g., via SlingDataFetcher or similar mechanism), allowing dynamic, computed, or integration fields to be exposed without model changes.
Environment Details (AEM version/service pack, any other specifics if applicable):	AEM 6.5 LTS; Content Fragment Models and GraphQL API; persisted queries; endpoints as described above.
Customer-name/Organization name:	JPMorgan Chase
Code package (if applicable):	https://experienceleaguecommunities.adobe.com/t5/adobe-experience-manager/how-to-expose-a-custom-res... . I have added the code here