Refactor full-text migrations and add folder to solr schema

modules/fts-client/src/main/scala/docspell/ftsclient/FtsClient.scala

@@ -17,11 +17,12 @@ import org.log4s.getLogger
   */
 trait FtsClient[F[_]] {
 
-  /** Initialization tasks. This is called exactly once and then never
+  /** Initialization tasks. This is called exactly once at the very
+    * beginning when initializing the full-text index and then never
     * again (except when re-indexing everything). It may be used to
     * setup the database.
     */
-  def initialize: F[Unit]
+  def initialize: List[FtsMigration[F]]
 
   /** Run a full-text search. */
   def search(q: FtsQuery): F[FtsResult]
@@ -107,8 +108,8 @@ object FtsClient {
     new FtsClient[F] {
       private[this] val logger = Logger.log4s[F](getLogger)
 
-      def initialize: F[Unit] =
-        logger.info("Full-text search is disabled!")
+      def initialize: List[FtsMigration[F]] =
+        Nil
 
       def search(q: FtsQuery): F[FtsResult] =
         logger.warn("Full-text search is disabled!") *> FtsResult.empty.pure[F]

modules/fts-client/src/main/scala/docspell/ftsclient/FtsMigration.scala

@@ -0,0 +1,24 @@
+package docspell.ftsclient
+
+import docspell.common._
+
+final case class FtsMigration[F[_]](
+    version: Int,
+    engine: Ident,
+    description: String,
+    task: F[FtsMigration.Result]
+)
+
+object FtsMigration {
+
+  sealed trait Result
+  object Result {
+    case object WorkDone   extends Result
+    case object ReIndexAll extends Result
+    case object IndexAll   extends Result
+
+    def workDone: Result   = WorkDone
+    def reIndexAll: Result = ReIndexAll
+    def indexAll: Result   = IndexAll
+  }
+}