fix: [sync] Proposal pull restricted to 14 days
fix: [sync] Proposal pull restricted to 14 days

- no need to pull ancient proposals each time

SteveClement/MISP,FIRSTdotorg/MISP,SteveClement/MISP,SteveClement/MISP,MISP/MISP,SteveClement/MISP,SteveClement/MISP,FIRSTdotorg/MISP,FIRSTdotorg/MISP,FIRSTdotorg/MISP,MISP/MISP,MISP/MISP,MISP/MISP,MISP/MISP