Issue #3529680: Add configurable synchronous/asynchronous dependency processing mode

Juanjo Lópezrequested to merge
issue/entity_mesh-3529680:3529680-performance-issue-when-there-are-many-links into 1.x
  • Replace process_mesh_using_queue checkbox with processing_mode radio buttons
    • Add synchronous_limit field to control number of links processed synchronously
    • Implement hybrid processing: first N links sync, remainder async via queue
    • Add dynamic form descriptions explaining each processing mode behavior
    • Update queue worker to handle individual link processing tasks
    • Default mode set to asynchronous for backward compatibility

This allows fine-tuning performance vs. immediacy trade-offs when processing entity dependencies, preventing timeouts while ensuring critical links are updated immediately.

Closes #3529680

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