handle duplicate notifications sent for the same book from different tasks

[elfkuzco]

Changes

• add task_id column to zimfarm_notifications table
• require task_id when processing notifications from zimfarm
• when new notification arrives and comes with a different task ID (which happens when user tries to upload an already processed book), allow it to pass but processing logic now marks it as bad notification instead of ignoring it as a duplicate notification. It is impossible to create a book with that notification ID as that would cause an integrity error (since book's PK is notification ID).
• mark possible title uploads coming from duplicate notification as failed in CMS (even though they aren't on Zimfarm). This quickly allows it to be processed by background tasks to delete manually upload zim from S3
• re-design zimfarm notification view with the same style as book view
• retreive notifications by combination of ZIM ID and task ID instead of just ZIM ID
• correctly associate title upload with the same book that zimfarm sent since we now have the same task ID

This fixes #494

[codecov]

Codecov Report

❌ Patch coverage is 84.61538% with 4 lines in your changes missing coverage. Please review.
✅ Project coverage is 81.75%. Comparing base (784affd) to head (1e786bd).
⚠️ Report is 4 commits behind head on main.

Files with missing lines	Patch %	Lines
...ms_backend/mill/processors/zimfarm_notification.py	69.23%	2 Missing and 2 partials ⚠️

Additional details and impacted files

@@            Coverage Diff             @@
##             main     #515      +/-   ##
==========================================
- Coverage   81.78%   81.75%   -0.03%     
==========================================
  Files          69       69              
  Lines        4397     4412      +15     
  Branches      515      518       +3     
==========================================
+ Hits         3596     3607      +11     
- Misses        640      642       +2     
- Partials      161      163       +2     

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[benoit74]

LGTM