v1.96.0

Features

• add LeadSource enum with MANUAL default
• migrate Lead.source to LeadSource enum, map unknowns to OTHER
• add Lead Source select field to create/edit dialog
• display lead source in details dialog
• add lead-sources helper with options and label lookup

Bug Fixes

• persist address on lead record and default source to MANUAL
• sync address edits to BusinessLocation and validate source enum