feat: deleted time added to the database

[Monirzadeh]

This PR will record deleted time with bookmark id in a seprate table.
any specific unit test needed?

Why we need this?

for create a sync functionality we need to have 3 things created_at modifieded_at and deleted_at
the last one added in this PR. as deleted_at use case is just for sync than keep that in separate table make things cleaner.

after merge #894 #896 and #903 i can finally send PR for add sync functionality to Shiori (some part of code is ready in local system). so user can sync their apps with Shiori server.

[codecov]

Codecov Report

Attention: Patch coverage is 0% with 30 lines in your changes are missing coverage. Please review.

Project coverage is 30.56%. Comparing base (595cb45) to head (aaf0d16).
Report is 34 commits behind head on master.

Files	Patch %	Lines
internal/database/mysql.go	0.00%	10 Missing ⚠️
internal/database/pg.go	0.00%	10 Missing ⚠️
internal/database/sqlite.go	0.00%	10 Missing ⚠️

Additional details and impacted files

@@            Coverage Diff             @@
##           master     #903      +/-   ##
==========================================
+ Coverage   25.58%   30.56%   +4.97%     
==========================================
  Files          47       60      +13     
  Lines        5628     4486    -1142     
==========================================
- Hits         1440     1371      -69     
+ Misses       3989     2893    -1096     
- Partials      199      222      +23     

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[fmartingr]

I'm still not sold on this because it changes a foundational thing about Shiori and it may be confusing for users (that delete no longer means delete). I'd rather think in a better way for third-parties to know when some bookmarks are gone. Is knowing when a bookmark has been deleted the only remaining problem?

[Monirzadeh]

yes knowing deleted item is the remaining part.
i thinking about different method

1. normally programs done thumb stone that i don't like that at all. (terrible method) big NO to me 🙅
2. a way is that user send id that have in client side and we check one by one (that i think it is intensive unless we find a way to done that quickly)
3. current method is the best way that i found yet that keep minimal possible footprint. not prefect.

client may don't have all bookmarks just have part of it.
for example in a database with 1000 bookmark client maybe have just 100 recently item (900 - 1000) but maybe client has bookmark id 503 (get and save that from tag search for example).
what is the best method to define which one of that 101 (900-1000 plus bookmark id 503) item deleted?

i need to return something like this:

• bookmarks added after timestamp user send (client last sync time)
• bookmark modified after timestamp user send
• list of id that deleted (better after timestamp user send)

one way is that i return any missing id with something like this (it is a quick code and has some bug) what do you think?

WITH RECURSIVE range(id) AS (
  SELECT 1
  UNION ALL
  SELECT id + 1 FROM range WHERE id < (SELECT MAX(id) FROM bookmark)
)
SELECT id
FROM range
WHERE id NOT IN (SELECT id FROM bookmark);