feat: add status column to records table

[jfcalvo]

Description

This PR include changes to add a new status column to records table with the following details:

• Possible values for this status column are pending and completed.
• This new column will be non-nullable.
• It will have a database index so it will be faster to recover records with one specific status value.
• By default the status column will have the pending value. (Showing that the record is still pending of being annotated).
• Existent old records will be migrated in the following way:
  • Records with a least one response with submitted status will be updated from pending to completed.

Closes #5058

Type of change

(Please delete options that are not relevant. Remember to title the PR according to the type of change)

• Bug fix (non-breaking change which fixes an issue)
• New feature (non-breaking change which adds functionality)
• Breaking change (fix or feature that would cause existing functionality to not work as expected)
• Refactor (change restructuring the codebase without changing functionality)
• Improvement (change adding some improvement to an existing functionality)
• Documentation update

How Has This Been Tested

(Please describe the tests that you ran to verify your changes. And ideally, reference tests)

• Manually test migration with SQLite.
• Manually test migration with PostgreSQL.

Checklist

• I added relevant documentation
• follows the style guidelines of this project
• I did a self-review of my code
• I made corresponding changes to the documentation
• My changes generate no new warnings
• I have added tests that prove my fix is effective or that my feature works
• I filled out the contributor form (see text above)
• I have added relevant notes to the CHANGELOG.md file (See https://keepachangelog.com/)

[codecov]

Codecov Report

All modified and coverable lines are covered by tests ✅

Project coverage is 91.98%. Comparing base (d5b762c) to head (a5826cb).
Report is 89 commits behind head on feat/create-datasets-with-distribution.

❗ Current head a5826cb differs from pull request most recent head 3ab044e

Please upload reports for the commit 3ab044e to get more accurate results.

Additional details and impacted files

@@                             Coverage Diff                             @@
##           feat/create-datasets-with-distribution    #5059       +/-   ##
===========================================================================
+ Coverage                                   61.16%   91.98%   +30.82%     
===========================================================================
  Files                                         328      136      -192     
  Lines                                       17683     5855    -11828     
===========================================================================
- Hits                                        10815     5386     -5429     
+ Misses                                       6868      469     -6399     

Flag	Coverage Δ
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argilla-server	91.98% <100.00%> (-0.06%)	⬇️

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