add: create sessions and marks tables in new db

util/import_photos.py

@@ -131,6 +131,36 @@ def check_database(database_path: str):
                     )"""
         )
         con.commit()
+
+        # create the rest of the tables, while we're at it
+        cur.execute(
+            """CREATE TABLE sessions
+                (
+                sessionid INTEGER PRIMARY KEY,
+                cookie TEXT UNIQUE NOT NULL,
+                description TEXT
+                )"""
+        )
+        con.commit()
+
+        cur.execute(
+            """CREATE TABLE marks
+                (
+                imgid INTEGER,
+                sessionid INTEGER,
+                mark INTEGER,
+                PRIMARY KEY (imgid, sessionid), 
+                FOREIGN KEY (imgid)
+                    REFERENCES images (imgid)
+                        ON DELETE NO ACTION
+                        ON UPDATE NO ACTION,
+                FOREIGN KEY (sessionid)
+                    REFERENCES sessions (sessionid)
+                        ON DELETE NO ACTION
+                        ON UPDATE NO ACTION
+                )"""
+        )
+        con.commit()
         # we only use this occasionaly with new databases,
         # so don't bother with transfer logic, just close and reopen it later
         con.close()