Improve logging configuration

- Log levels of specific loggers can be defined in the config
  file (doesn't work with env variables)

- Log events of background tasks carry now additional data

modules/logging/api/src/main/scala/docspell/logging/LogConfig.scala

@@ -10,10 +10,26 @@ import cats.data.NonEmptyList
 
 import io.circe.{Decoder, Encoder}
 
-final case class LogConfig(minimumLevel: Level, format: LogConfig.Format) {}
+final case class LogConfig(
+    minimumLevel: Level,
+    format: LogConfig.Format,
+    levels: LogConfig.ExtraLevels
+) {
+
+  def clearLevels: LogConfig =
+    copy(levels = Map.empty)
+
+  def withLevel(logger: String, level: Level): LogConfig =
+    copy(levels = levels.updated(logger, level))
+
+  def docspellLevel(level: Level): LogConfig =
+    withLevel("docspell", level)
+}
 
 object LogConfig {
 
+  type ExtraLevels = Map[String, Level]
+
   sealed trait Format { self: Product =>
     def name: String =
       productPrefix.toLowerCase
@@ -38,8 +54,10 @@ object LogConfig {
   }
 
   implicit val jsonDecoder: Decoder[LogConfig] =
-    Decoder.forProduct2("minimumLevel", "format")(LogConfig.apply)
+    Decoder.forProduct3("minimumLevel", "format", "levels")(LogConfig.apply)
 
   implicit val jsonEncoder: Encoder[LogConfig] =
-    Encoder.forProduct2("minimumLevel", "format")(r => (r.minimumLevel, r.format))
+    Encoder.forProduct3("minimumLevel", "format", "levels")(r =>
+      (r.minimumLevel, r.format, r.levels)
+    )
 }

modules/logging/api/src/main/scala/docspell/logging/LogEvent.scala

@@ -26,6 +26,9 @@ final case class LogEvent(
   def data[A: Encoder](key: String, value: => A): LogEvent =
     copy(data = data.updated(key, () => Encoder[A].apply(value)))
 
+  def addData(m: Map[String, Json]): LogEvent =
+    copy(data = data ++ m.view.mapValues(json => () => json).toMap)
+
   def addMessage(msg: => String): LogEvent =
     copy(additional = (() => Left(msg)) :: additional)