Calibrated Multi-Modal Urban Telemetry & Transfer Certainty Feed

Headless B2B REST/JSON broker unifying Long Win (LWB), KMB, Citybus, NLB, MTR Heavy/Light Rail, and Hong Kong Ferry fairways. Eliminates raw government API dropouts ("- min"), ghost buses, and coordinate drift via downstream loop bridging (k+1, k+2) and 4-phase harbour kinematics.