feat(server/gtfsr): initial impl of gtfsr; archive all data

shared/src/commonMain/kotlin/moe/lava/banksia/Constants.kt.skeleton

@@ -3,6 +3,7 @@ package moe.lava.banksia
 object Constants {
     const val devid: String = ""
     const val key: String = ""
+    const val opendataKey: String = ""
     const val serverUrl: String = "https://banksia.lava.moe/api/"
     // TODO
     const val devMode: Boolean = false

shared/src/commonMain/kotlin/moe/lava/banksia/util/Logging.kt

@@ -3,3 +3,7 @@ package moe.lava.banksia.util
 fun error(tag: String, throwable: Throwable) = error(tag, "", throwable)
 expect fun log(tag: String, msg: String)
 expect fun error(tag: String, msg: String, throwable: Throwable? = null)
+
+class LogScope(private val tag: String) {
+    fun log(msg: String) = log(tag, msg)
+}