Add case-insensitive uniqueness to Category, CategoryType, and Sector

[diti0-dot]

• This work Closes Add case insensitive uniqueness to Category, CategoryType, and Sector #519

What is the goal of this PR and why is this important?

Add case-insensitive uniqueness validation to Category, CategoryType, and Sector models to prevent duplicate data creation.

How did you approach the change?

Updated model validations from validates_presence_of :name, uniqueness: true to proper validates :name, presence: true, uniqueness: { case_sensitive: false }.

Anything else to add?

No

[maebeale]

@diti0-dot looks like the factories need to be updated to sequences or Faker data instead of hard-coded names?

[diti0-dot]

@diti0-dot looks like the factories need to be updated to sequences or Faker data instead of hard-coded names?

@maebeale I’ve updated the factories and added sequences for CategoryType and Sector so that all names are now unique, which should prevent the previous test failures.