Integrate v4 document library for SQLite

- Eliminate warnings for PostgreSQL

src/MyWebLog.Data/SQLite/SQLiteThemeData.fs

@@ -11,7 +11,7 @@ open MyWebLog.Data
 type SQLiteThemeData(conn : SqliteConnection, log: ILogger) =
     
     /// The JSON field for the theme ID
-    let idField = $"data ->> '{nameof Theme.Empty.Id}'"
+    let idField = $"data->>'{nameof Theme.Empty.Id}'"
     
     /// Convert a document to a theme with no template text
     let withoutTemplateText (rdr: SqliteDataReader) =
@@ -48,7 +48,7 @@ type SQLiteThemeData(conn : SqliteConnection, log: ILogger) =
         match! findByIdWithoutText themeId with
         | Some _ ->
             do! conn.customNonQuery
-                    $"DELETE FROM {Table.ThemeAsset} WHERE theme_id = @id;
+                    $"{Query.delete Table.ThemeAsset} WHERE theme_id = @id;
                       {Query.byId (Query.delete Table.Theme) (string themeId)}"
                     [ idParam themeId ]
             return true
@@ -87,7 +87,7 @@ type SQLiteThemeAssetData(conn : SqliteConnection, log: ILogger) =
     /// Delete all assets for the given theme
     let deleteByTheme (themeId: ThemeId) =
         log.LogTrace "ThemeAsset.deleteByTheme"
-        conn.customNonQuery $"DELETE FROM {Table.ThemeAsset} WHERE theme_id = @id" [ idParam themeId ]
+        conn.customNonQuery $"{Query.delete Table.ThemeAsset} WHERE theme_id = @id" [ idParam themeId ]
     
     /// Find a theme asset by its ID
     let findById assetId =