feat(collectors): add Erasmus Mundus collector

feat(collectors): add Erasmus Mundus collector

feat(collectors): add Campus France collector

feat(collectors): add Campus France collector

feat(collectors): add African Union opportunities collector

feat(collectors): add University of Bamenda collector

feat(collectors): add University of Dschang collector

feat(collectors): add University of Douala opportunity collector

feat(collectors): add University of Buea opportunity collector

feat(collectors): add MINESUP collector validation

feat(opportunities): add official UNESCO internships collector

feat(collectors): implement Mastercard Foundation collector

feat: synchronize Chevening opportunities with Neon

chore: remove temporary collector startup check

feat: add Chevening opportunity collector

feat(database): add user model and initial migration

feat: initialize VerifPulse FastAPI backend