Easy-OTP QGIS 4 compatibility

Automates temporal accessibility analysis for public transport using OpenTripPlanner 1.5.0. Generates per-minute travel-time surfaces, counts continuous service-time minutes per hexagonal grid cell, and classifies cells into four categories. Analysis algorithms: RunTemporalAccessibility (depart-at and arrive-by modes, optional XLSX report), CountFromExistingSurfaces, CompareTemporalAccessibility (delta analysis), GenerateHexGrid, PrepareStudentLayer, PopulationOverlay, GenerateIsochrones (isochrone polygons from/to 1..N points, one time, multiple cutoffs), GenerateIsochronesOverTime (one point, isochrones across the day for the Temporal Controller), RunServiceCoverage (count of service points reachable per cell within a threshold at one time; raster + optional grid), RunOriginDestinationTimes (per-origin trip stats to one destination: duration, in-vehicle, walk, wait, transfers; parallelised), RunTravelTimeMatrix (N×M origin–destination travel-time matrix), RouteViaPoints (city tour planner: ordered route through optional via-points using nearest-neighbour + 2-opt; modes: WALK, BICYCLE, CAR, TRANSIT,WALK). Realtime algorithms: RunRealtimeAccessibility (RT-1, live GTFS-RT feed integrated into OTP), RecordGtfsRt (RT-2, GTFS-RT TripUpdates archiver for offline analysis), BuildRealizedGtfs (RT-3, reconstructs a realized static GTFS — P50 median and P85 85th-percentile feeds — from a RecordGtfsRt snapshot archive; output feeds can be passed directly to RunTemporalAccessibility; requires google.protobuf bootstrapped on first use; v0.7 adds auto-detected MATCHING_MODE and SEGMENT_SOURCE_MODE fallbacks for feeds whose trip_id namespace or message shape differs from Gdańsk's, e.g. Poznań/Kraków). Setup: DownloadJre (Eclipse Temurin 8 + OTP 1.5.0 jar, SHA-256 verified), DownloadTransitData (Geofabrik OSM + Transitland GTFS), TestOtpServer.