[release] Bump to version 50.2

- Koreader imports only import single-page scrobbles the next day
- Fix bugs in celery tasks causing imports to fail

PROJECT.org

@@ -88,7 +88,7 @@ fetching and simple saving.
 *** Metadata sources
 **** Scraper
 
-* Backlog [1/17] :vrobbler:project:personal:
+* Backlog [0/15] :vrobbler:project:personal:
 ** TODO [#C] Create small utility to clean up tracks scrobbled with wonky playback times :vrobbler:personal:bug:music:scrobbles:
 :PROPERTIES:
 :ID:       702462cf-d54b-48c6-8a7c-78b8de751deb
@@ -544,6 +544,7 @@ log a warning and move on.
 We should have a global view `/favorites/` that shows the logged in users's
 favorited media objects.
 
+* Version 50.2 [2/2]
 ** DONE [#B] Koreader imports only import single-page scrobbles the next day :bug:books:importers:
 :PROPERTIES:
 :ID:       b50141fd-cda6-4a3a-afd3-cd8499e7523e
@@ -554,7 +555,7 @@ favorited media objects.
 When you read a single page in a book in Koreader and try to import it, the scrobble is only
 created the day after, not on the day of the reading.
 
-** STRT [#A] Fix bugs in celery tasks causing imports to fail :bug:celery:tasks:
+** DONE [#A] Fix bugs in celery tasks causing imports to fail :bug:celery:tasks:
 :PROPERTIES:
 :ID:       d1171cb0-6413-44b8-a68a-019a4d2fb285
 :END:
@@ -565,6 +566,7 @@ Seems like all celery tasks are failing for different reasons except the chart
 updates.
 
 *** Errors
+****  scrobbles.tasks.send_notification_for_in_progress
 #+begin_src bash
 KeyError: 'track'
 
@@ -579,6 +581,26 @@ LINE 1: ..."."title", "music_track"."base_run_time_seconds", "music_tra...
 ^
 HINT: Perhaps you meant to reference the column "music_track.artist_fk_id".
 #+end_src
+
+**** scrobbles.tasks.import_from_webdav_all_users
+#+begin_src bash
+File "/usr/local/lib/python3.11/site-packages/vrobbler/apps/scrobbles/importers/webdav.py", line 166, in scan_webdav_for_koreader
+if last_import and last_import.webdav_etag and remote_etag:
+^^^^^^^^^^^^^^^^^^^^^^^
+AttributeError: 'KoReaderImport' object has no attribute 'webdav_etag'
+#+end_src
+
+**** scrobbles.tasks.process_bgstats_import
+#+begin_src bash
+
+Traceback (most recent call last):
+File "/usr/local/lib/python3.11/site-packages/django/db/backends/utils.py", line 89, in _execute
+return self.cursor.execute(sql, params)
+^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
+psycopg2.errors.NotNullViolation: null value in column "visibility" of relation "scrobbles_scrobble" violates not-null constraint
+DETAIL: Failing row contains (374463, 2026-06-11 13:27:06.528319+00, 2026-06-11 13:27:06.52834+00, 2026-06-11 13:17:34+00, 180, f, f, BG Stats, 1, null, t, {"players": [{"new": false, "win": false, "rank": 0, "role": "",..., null, null, null, 8e73ceec-b731-4623-9637-712bbf9f76ce, null, null, null, null, , null, BoardGame, 324, null, null, America/New_York, null, null, , null, null, , null, null, null, null, null, null, null, null, null, null, null).
+#+end_src
+
 * Version 50.1 [1/1]
 ** DONE [#B] Fix bug in charts where only #1 is displayed :charts:templates:
 :PROPERTIES: