🧪 Add test for unique branch name generation

[pr-pilot-ai[bot]]

This PR adds tests for the create_unique_branch_name method in the TaskEngine class and updates the branch name generation logic.

Changes

• Branch Name Generation

  • Introduce MAX_BRANCH_NAME_LENGTH constant set to 24 characters.
  • Modify create_unique_branch_name to truncate branch names at the last hyphen before 24 characters.
  • Ensure unique branch names by appending incrementing numbers if a branch already exists.

• Tests

  • Add parameterized tests for create_unique_branch_name to handle existing branches and various input cases.
  • Use MagicMock to mock external dependencies.

• Version Update

  • Bump version from 1.4.2 to 1.4.3.