feat : add validations

[epicadk]

Description

Fixes #1083

Type of Change:

• Code

Code/Quality Assurance Only

• New feature (non-breaking change which adds functionality pre-approved by mentors)

How Has This Been Tested?

ran tests

Checklist:

• My PR follows the style guidelines of this project
• I have performed a self-review of my own code or materials

Code/Quality Assurance Only

• My changes generate no new warnings
• My PR currently breaks something (fix or feature that would cause existing functionality to not work as expected)
• I have added tests that prove my fix is effective or that my feature works
• New and existing unit tests pass locally with my changes
• Any dependent changes have been published in downstream modules

[codecov]

Codecov Report

Merging #1096 (e0af4f7) into develop (ee009cf) will increase coverage by 0.09%.
The diff coverage is 100.00%.

@@             Coverage Diff             @@
##           develop    #1096      +/-   ##
===========================================
+ Coverage    92.90%   93.00%   +0.09%     
===========================================
  Files           38       38              
  Lines         2073     2102      +29     
===========================================
+ Hits          1926     1955      +29     
  Misses         147      147              

Impacted Files	Coverage Δ
app/database/models/mentorship_relation.py	100.00% <100.00%> (ø)
app/database/models/task_comment.py	96.15% <100.00%> (+0.69%)	⬆️
app/database/models/user.py	98.79% <100.00%> (+0.22%)	⬆️

[devkapilbansal]

What's the reason for changing name from User1 to UserA?

[epicadk]

User1 is not a valid name.
Refer

mentorship-backend/app/utils/validation_utils.py

Lines 4 to 7 in ee009cf

	For the "name" field to be valid, it may contain one or more character from:
	- letter "a" to "z" and/or "A" to "Z",
	- any of the whitespace characters, and/or
	- special character "-".

[devkapilbansal]

LGTM 👍

[isabelcosta]

@epicadk can you please resolve conflicts here. I'm sorry I've missed this PR, and I am happy to review and approve :)