BizCore v5.6.2 Supplier Type Hotfix SAFE

Fixes:
- Current CRM contacts.contact_type accepts 'individual' or 'company'.
- Supplier creation now stores 'company' instead of the obsolete 'business' value.
- Keeps v5.6.1 contact_code compatibility logic.
- No database tables or existing records are deleted/reset.

Install:
1. Extract into the ceylongemx.online BizCore root and overwrite existing files.
2. Open /update-5.6.2.php while logged in as Super Admin.
3. Test Add Supplier.
