Adds richer demo records across CRM, Events, HR, Expenses, Attendance, Recruitment, and Projects. This helps users and evaluators better understand common workflows such as sales follow-ups, event attendance, employee attendance, expense approvals, hiring pipelines, and project activities.

Description of the issue/feature this PR addresses:
task link - 
https://www.odoo.com/web#id=43001&view_type=form&model=project.task&action=327&menu_id=4720
Current behavior before PR:

Desired behavior after PR is merged:


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This update adds sample data for coupons, promotions, helpdesk tickets, signing templates, and signature requests so teams can better demonstrate and test these apps. It also adjusts lead scoring demo data to avoid leaving leads unassigned, helping dashboards show expected information after installation.

task link
https://www.odoo.com/web#id=43001&view_type=form&model=project.task&action=327&menu_id=4720