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/fts-psql/src/test/scala/docspell/ftspsql/MigrationTest.scala

@@ -27,9 +27,7 @@ class MigrationTest
     PostgreSQLContainer.Def(DockerImageName.parse("postgres:14"))
 
   override def docspellLogConfig: LogConfig =
-    LogConfig(Level.Debug, LogConfig.Format.Fancy)
-
-  override def rootMinimumLevel = Level.Warn
+    super.docspellLogConfig.docspellLevel(Level.Debug)
 
   test("create schema") {
     withContainers { cnt =>

modules/fts-psql/src/test/scala/docspell/ftspsql/PsqlFtsClientTest.scala

@@ -31,9 +31,7 @@ class PsqlFtsClientTest
   private val table = FtsRepository.table
 
   override def docspellLogConfig: LogConfig =
-    LogConfig(Level.Debug, LogConfig.Format.Fancy)
-
-  override def rootMinimumLevel = Level.Warn
+    super.docspellLogConfig.docspellLevel(Level.Debug)
 
   test("insert data into index") {
     withContainers { cnt =>