Narrow catch-all in TryApplyDatabaseProjectionAsync

[erlendellefsen]

JsonApiToolkit/Controllers/JsonApiController.cs:577 catches Exception and falls back to a full entity load. That swallows cancellation, OOM, and DB timeouts as benign warnings.

Acceptance criteria

• catch uses a when filter limited to the expected reflection / EF expression-build exceptions (mirror FilteredIncludeBuilder.cs:187 and QueryHelpers.cs:137)
• OperationCanceledException is not caught
• Test: cancelling a request during projection cancels rather than falling back