feat(backend): add student payment APIs and stabilize transcript/assignment responses.

feat: Hugging Face Docker Space, uploads chown, and Swagger fixes for production

feat: implement core backend modules, notification system, and AI agent skill documentation

fix(database): normalize FK column types for refactored schema sync

refactor: resolve circular dependencies and optimize entities for SWC builder

TA Dashboard SHARING components

Some UI Changes

feat: enhance Swagger documentation with examples and descriptions

fix: align entities with DB schema - files, folders, rubrics

feat: implement Sprint 1 Dev A - Assignments and Grades modules