Feat: improve translation filters

[abdullai-t]

Summary / Highlights

This PR introduces several enhancements and fixes to the translation filters and middleware functionality. The key changes include:

• Added exclusion patterns for specific URLs in translation_exclusion_patterns.py to prevent certain keys from being translated.
• Integrated exclusion patterns to skip translation for specified keys.
• Updated the list of translatable fields for some models in the database Django app.
• Both __user_language and __preferred_language can now be used as keys for the target language.

Details (Give details about what this PR accomplishes, include any screenshots etc)

Testing Steps (Provide details on how your changes can be tested)

Requirements (place an x in each [ ])

• [x] I've read and understood the Contributing Guidelines and have done my best effort to follow them.
• [x] I've tested my changes manually.
• [ ] I've added unit tests to my PR.

Transparency (Project board)

• [x] I've given my PR a meaningful title.
• [ ] I linked this PR to the relevant issue.
• [ ] I moved the linked issue from the "Sprint backlog" to "In progress" when I started this.
• [ ] I moved the linked issue to "QA Verification" now that it is ready to merge.

[codecov[bot]]

Codecov Report

Attention: Patch coverage is 76.31579% with 9 lines in your changes missing coverage. Please review.

Project coverage is 55.74%. Comparing base (40260eb) to head (98a3610). Report is 1 commits behind head on main.

Files	Patch %	Lines
src/_main_/utils/translation/__init__.py	64.28%	5 Missing :warning:
src/api/middlewares/translation_middleware.py	55.55%	4 Missing :warning:

Additional details and impacted files

```diff @@ Coverage Diff @@ ## main #1151 +/- ## ========================================== - Coverage 55.95% 55.74% -0.22% ========================================== Files 462 461 -1 Lines 34054 33875 -179 ========================================== - Hits 19055 18883 -172 + Misses 14999 14992 -7 ```

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