Enhance Testimonial Auto-Sharing Feature

[abdullai-t]

Summary / Highlights

This pull request introduces the following changes:

• Updated variable names in the auto-share creation and update route handlers to match the database schema, ensuring consistency and improving code readability.
• Added the capability to auto-share testimonials based on categories (tags)

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.
• [x] 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 77.77778% with 6 lines in your changes missing coverage. Please review.

Project coverage is 57.12%. Comparing base (f42f746) to head (2de60d1). Report is 3 commits behind head on main.

Files with missing lines	Patch %	Lines
src/api/store/testimonial.py	78.26%	5 Missing :warning:
src/database/models.py	66.66%	1 Missing :warning:

Additional details and impacted files

```diff @@ Coverage Diff @@ ## main #1178 +/- ## ========================================== + Coverage 57.08% 57.12% +0.03% ========================================== Files 485 485 Lines 35737 35741 +4 ========================================== + Hits 20402 20417 +15 + Misses 15335 15324 -11 ```

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