Summary

Remove unnecessary error re-exports in jtk's API package - callers can import the shared errors package directly.

Current State

tools/jtk/api/errors.go re-exports shared errors:

var (
    ErrNotFound     = sharederrors.ErrNotFound
    ErrUnauthorized = sharederrors.ErrUnauthorized
    ErrForbidden    = sharederrors.ErrForbidden
    ErrBadRequest   = sharederrors.ErrBadRequest
    ErrServerError  = sharederrors.ErrServerError
    ErrRateLimited  = sharederrors.ErrRateLimited
)

func IsNotFound(err error) bool {
    return sharederrors.IsNotFound(err)
}
func IsUnauthorized(err error) bool {
    return sharederrors.IsUnauthorized(err)
}
func IsRateLimited(err error) bool {
    return sharederrors.IsRateLimited(err)
}

Proposed Changes

1. Remove re-exported error variables and functions
2. Keep only tool-specific errors: ErrIssueKeyRequired, ErrProjectKeyRequired
3. Update callers to import github.com/open-cli-collective/atlassian-go/errors directly

Impact

~20 lines removed, 1 file changed, callers updated to use shared package

Benefits

• Less indirection
• Clearer dependency on shared package
• Easier to maintain