PBLRepositoryMetrics: SCM-grounded conformance evaluation for PBL digital twins

PBLRepositoryMetrics is a teacher-support system for Project-Based Learning (PBL) environments. It captures repository events from GitLab and evaluates them against a Software Configuration Management (SCM) baseline defined by a metaproject (Sprint Descriptor), using Complex Event Processing (CEP) to compute daily conformance distances. A four-phase pipeline performs static verification, dynamic CEP pattern detection, and LLM-based semantic evaluation, producing per-deliverable diagnostic reports for evaluators. The baseline evolves through professor assessment, preserving the professor as the final interpreter.