Make projectId optional for WebSub and WebBroker API list endpoints

Summary

The list endpoints for both WebSub APIs and WebBroker APIs currently require a non-empty projectId query parameter and return 400 Bad Request when it is absent. This blocks org-level listing (i.e., listing all APIs across all projects within an organization).

The underlying service layer already supports optional project filtering — an empty projectId is passed through to the repository, which omits the project_uuid filter and returns all APIs for the org.

Affected Files

• platform-api/src/internal/handler/websub_api.go (lines 100–104)
• platform-api/src/internal/handler/webbroker_api.go (lines 100–104)

Expected Behavior

projectId should be an optional query parameter. When omitted, both list endpoints should return all APIs for the organization.

Fix

Remove the early-return block that rejects an empty projectId in both handlers, allowing the empty string to flow into the service List call unchanged.

References

• PR: https://github.com/wso2/api-platform/pull/1992
• Comment: https://github.com/wso2/api-platform/pull/1992#discussion_r3273481541
• Requested by: @senthuran16