Add ModelState validation checks for all controller actions

[axunonb]

Introduced validation checks for ModelState.IsValid at the beginning of controller actions. If the model state is invalid, the actions now return appropriate HTTP responses such as BadRequest(), NotFound(), Forbid(), NoContent(), or redirect to specific views or actions. This enhances the robustness and security of the application by ensuring only valid data is processed.

[sonarcloud[bot]]

Quality Gate passed

Issues
0 New issues
0 Accepted issues

Measures
0 Security Hotspots
0.0% Coverage on New Code
0.0% Duplication on New Code

See analysis details on SonarCloud