Extract climb detection into a dedicated climb package

Move climb detection, slope, and Cotacol scoring out of ride into a new
climb package that operates on a geometry-only Route (distances, elevations,
coords). Ride embeds climb.Route and keeps its timing and telemetry columns.

- climb.Detect returns []DetectedClimb (Climb + ride-absolute Start).
- Climb owns its sliced geometry; indices are local, with Start reported at
  the detection boundary for absolute position.
- Detected bounds use core.Interval; freeRegions claim suppression fixed.
- ride no longer builds slices: ClimbFromDist/ClimbFromIndexes/climbFrom and
  ride.Climb/Interval/Range are removed; rideanalysis, mountain_pass MatchClimb,
  and web views are rewired to climb types.
- New internal/routetest builds climb.Route from the ride DSL; ridetest reuses
  it and adds timestamps and telemetry.
- Tests moved to climb (synthetic detection and difficulty) and kept in ride
  for GPX-example integration; ride.comparison detection coverage retained.
- mountain_pass.nearestCrossing now reuses geo.Nearest.

1 files changed, 2 insertions, 1 deletions

diff --git a/web/ride-filters_test.go b/web/ride-filters_test.go
index e4efc02..84c6417 100644
--- a/web/ride-filters_test.go
+++ b/web/ride-filters_test.go
@@ -8,6 +8,7 @@ import (
 	"testing"
 	"time"
 
+	"github.com/martinlehoux/biking_home/climb"
 	"github.com/martinlehoux/biking_home/ride"
 	"github.com/stretchr/testify/assert"
 	"github.com/stretchr/testify/require"
@@ -209,7 +210,7 @@ func TestFilterRidesByCotacolExcludesUnavailableScores(t *testing.T) {
 			WHEN ? THEN 'old'
 		END
 		WHERE external_id IN (?, ?)
-	`, current.ExternalID, stale.ExternalID, current.ExternalID, ride.CotacolAlgorithmVersion, stale.ExternalID, current.ExternalID, stale.ExternalID)
+	`, current.ExternalID, stale.ExternalID, current.ExternalID, climb.CotacolAlgorithmVersion, stale.ExternalID, current.ExternalID, stale.ExternalID)
 	require.NoError(t, err)
 	items, err := ride.List(db)
 	require.NoError(t, err)