Create RELEASE_CHANGELOG.md

Author: VillePihlava

digitransit/RELEASE_CHANGELOG.md

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+# Digitransit OTP Release Summary
+
+## Changelog _20260311_ vs _upstream/dev-2.x_
+
+### Added PRs
+- Add select/not filters to estimatedCalls in Transmodel [#7305](https://github.com/opentripplanner/OpenTripPlanner/pull/7305)
+- Cleanup regular transfer build parameters [#7425](https://github.com/opentripplanner/OpenTripPlanner/pull/7425)
+- Add CostlyAssertions feature that should be turned off in production and improve performance of via routing with coordinates [#7301](https://github.com/opentripplanner/OpenTripPlanner/pull/7301)
+- Added carpooling as an access/egress mode [#7341](https://github.com/opentripplanner/OpenTripPlanner/pull/7341)
+-  Cache TransferIndexGenerator results to skip redundant regeneration [#7355](https://github.com/opentripplanner/OpenTripPlanner/pull/7355)
+- Improve compatibility with Swiss NeTEx data [#7427](https://github.com/opentripplanner/OpenTripPlanner/pull/7427)
+- fix: Introduce stable order for fareZones (tariffZones) [#7434](https://github.com/opentripplanner/OpenTripPlanner/pull/7434)
+- Prevent long routes mistakenly getting grouped across service-date [#7452](https://github.com/opentripplanner/OpenTripPlanner/pull/7452)
+- Migrate away from deprecated FeedScopedId.parse() [#7457](https://github.com/opentripplanner/OpenTripPlanner/pull/7457)
+- Expose GTFS feed version in the GTFS GraphQL API [#7445](https://github.com/opentripplanner/OpenTripPlanner/pull/7445)
+- Fix MC Raptor Pareto comparator performance regression [#7440](https://github.com/opentripplanner/OpenTripPlanner/pull/7440)
+- Update to Java 25 [#7246](https://github.com/opentripplanner/OpenTripPlanner/pull/7246)
+- Add distance for stop-to-stop shapes, `PointsOnLink` in Transmodel API [#6982](https://github.com/opentripplanner/OpenTripPlanner/pull/6982)
+- Support `DestinationDisplay` for SIRI `RecordedCall` [#7007](https://github.com/opentripplanner/OpenTripPlanner/pull/7007)
+- Add transit service validity dates and CPU cores to GraphQL ServerInfo and transitInfo [#6996](https://github.com/opentripplanner/OpenTripPlanner/pull/6996)
+- Fix missing transfers [#7042](https://github.com/opentripplanner/OpenTripPlanner/pull/7042)
+- Add Transmodel `carpool` street mode [#7084](https://github.com/opentripplanner/OpenTripPlanner/pull/7084)
+- Add native scooter preference parameters to TransModel GraphQL API [#7035](https://github.com/opentripplanner/OpenTripPlanner/pull/7035)
+- Support `gml:LineString` format with list of `gml:pos` elements [#7135](https://github.com/opentripplanner/OpenTripPlanner/pull/7135)
+- Add Route/Trip/TripOnServiceDate replacement to query APIs [#7126](https://github.com/opentripplanner/OpenTripPlanner/pull/7126)
+- Allow missing arrival time on the first stop in a GTFS-RT TripUpdate [#7245](https://github.com/opentripplanner/OpenTripPlanner/pull/7245)
+- Support for SIRI ArrivalStatus.ARRIVED on EstimatedCalls [#7299](https://github.com/opentripplanner/OpenTripPlanner/pull/7299)
+- Mark RecordedCall without ActualDepartureTime as not departed [#7336](https://github.com/opentripplanner/OpenTripPlanner/pull/7336)
+- Reject SIRI messages with missing Order attribute on calls [#7324](https://github.com/opentripplanner/OpenTripPlanner/pull/7324)
+- Add running days to flex routing [#7281](https://github.com/opentripplanner/OpenTripPlanner/pull/7281)
+- Fix booking time calculation for multi-day flex trip searches [#7255](https://github.com/opentripplanner/OpenTripPlanner/pull/7255)
+- Fix empty string handling for `banned.routes` and `banned.agencies` in GTFS API [#7340](https://github.com/opentripplanner/OpenTripPlanner/pull/7340)
+- Improve stop connectivity check [#7375](https://github.com/opentripplanner/OpenTripPlanner/pull/7375)
+- Infer vehicle position's service date for ADDED trip [#7179](https://github.com/opentripplanner/OpenTripPlanner/pull/7179)
+- Fix walk steps for escalators leading directly to a station entrance [#7361](https://github.com/opentripplanner/OpenTripPlanner/pull/7361)
+- Reduce Raptor on-board optimal set by using strict less-than for tripSortIndex [#7417](https://github.com/opentripplanner/OpenTripPlanner/pull/7417)
+- fix: Return NO_TRANSIT_CONNECTION_IN_SEARCH_WINDOW when transit search finds no trips [#7398](https://github.com/opentripplanner/OpenTripPlanner/pull/7398)
+- Fix findTripTimesOnDate filters using wrong route mode and applying filters after limit [#7408](https://github.com/opentripplanner/OpenTripPlanner/pull/7408)