SiteHut beta 0.4.3

This beta update makes simple variation records quicker to complete and easier to review.

• Relevant contact choices: Customer and instruction fields now show the appropriate client-side contacts, while contractor fields focus on builder staff.
• Helpful builder defaults: SiteHut can pre-fill the current builder contact on new proposals when their project membership is available.
• Clearer verbal records: The people involved are grouped separately from the date and time spoken, making the record easier to scan and complete.
• Easier time-impact choices: Duration certainty options now use a clearer stacked layout, helping distinguish estimates, fixed adjustments, later assessments, and no time impact.
• More focused guidance: CVIs, CVRs, and builder proposals use shorter, more practical explanations of what each document records and what must happen next.

This release also improves contact role labels and strengthens the underlying variation field handling.