refactor: optimisation around stoptimes

- moved stoptime related functionality into new core:data:stoptime module
  - will feature all the different realtime stoptime sources to be
      integrated later
- create proper database schema for future migrations
- deduplicate trips into stoppingpatterns, since many trips share the
  exact same stopping pattern
  - stoptimes are now linked to stoppingpatterns instead
  - stoppingpattern ids are generated from a hash composed of all stoptimes
- stoptimes now use deltas for arrival time to save space

server/src/main/kotlin/moe/lava/banksia/server/Application.kt

@@ -151,7 +151,7 @@ fun Application.module() {
                     )
                     .executeAsList()
                     .map { it.asModel().atDate(date) }
-                    .sortedBy { it.departureTime }
+                    .sortedBy { it.time.departure }
             }
             call.respond(times)
         }

server/src/main/kotlin/moe/lava/banksia/server/GtfsImporter.kt

@@ -6,7 +6,6 @@ import moe.lava.banksia.core.model.Service
 import moe.lava.banksia.core.model.ServiceException
 import moe.lava.banksia.core.model.Shape
 import moe.lava.banksia.core.model.Stop
-import moe.lava.banksia.core.model.StopTime
 import moe.lava.banksia.core.model.Trip
 import moe.lava.banksia.core.sqld.DatabaseManager
 import moe.lava.banksia.core.sqld.mappers.asDb
@@ -30,7 +29,6 @@ class GtfsImporter(
                 is GtfsData.ServiceExceptionChunk -> database.addServiceExceptions(chunk.exceptions)
                 is GtfsData.ShapeChunk -> database.addShapes(chunk.shapes)
                 is GtfsData.StopChunk -> database.addStops(chunk.stops)
-                is GtfsData.StopTimeChunk -> database.addStopTimes(chunk.stopTimes)
                 is GtfsData.TripChunk -> database.addTrips(chunk.trips)
             }
         }
@@ -101,21 +99,15 @@ class GtfsImporter(
         log.info("done")
     }
 
-    private fun Database.addStopTimes(stopTimes: List<StopTime>) {
-        log.info("inserting ${stopTimes.size} stoptimes...")
-        stopTimeQueries.transaction {
-            stopTimes.forEach {
-                stopTimeQueries.insert(it.asDb())
-            }
-        }
-        log.info("done")
-    }
-
-    private fun Database.addTrips(trips: List<Trip>) {
+    private fun Database.addTrips(trips: List<Trip.Undated>) {
         log.info("inserting ${trips.size} trips...")
-        tripQueries.transaction {
-            trips.forEach {
-                tripQueries.insert(it.asDb())
+        transaction {
+            trips.forEach { trip ->
+                stoppingPatternQueries.insert(trip.pattern.asDb())
+                trip.pattern.stoptimes.forEach { stoptime ->
+                    stopTimeQueries.insert(stoptime.asDb())
+                }
+                tripQueries.insert(trip.asDb())
             }
         }
         log.info("done")

server/src/main/resources/logback.xml

@@ -14,7 +14,7 @@
             <pattern>%d{YYYY-MM-dd HH:mm:ss.SSS} [%thread] %-5level %logger{36} - %msg%n</pattern>
         </encoder>
     </appender>
-    <root level="trace">
+    <root level="debug">
         <appender-ref ref="FILE"/>
         <appender-ref ref="STDOUT"/>
     </root>