Upgrades the FG3-4 sub-process from a composition stub to a Level 4 atomic
executable: BPMN process Process_SaimnieciskaNorekina (advance request,
settlement submission/approval, VPC processing, reconciliation and outcome
handling across the Nodarbinatais/Iestade/VPC lanes), DMN decision
Decision_AvansaNorekins (FIRST hit policy, advance-vs-expense reconciliation),
resource roles/agents/mappings and policies metadata. Transcribed from the
Valsts Kase FG3 register sections 3.5.2 and 3.5.4. Validates against the
UAPF 2.2.0 schemas and the uapf-cli validator.
