Variable getGetSimilarJourneysUrlConst

Identifies journeys for the given passenger that conflict in time with the specified journey.

Results are split into two categories:

• duplicate: same origin, destination, and near-identical departure/arrival times (±5 minutes)
• overlapping: any journey whose time range overlaps the queried journey (within the buffer), excluding duplicates

Cancelled and completed journeys are excluded from both categories.