Description

Implement plan review workflow with operations to approve or reject member-proposed plans.

Acceptance Criteria

• approve_plan updates plan status to "approved"
• reject_plan updates plan status to "rejected"
• Both update message logs with decision reason
• Only members with appropriate role can approve/reject
• Invalid plan IDs return clear errors

Sub-issues

• Claude/claude code config guide 7 pn b7 #9.1 Implement approve_plan operation
• Claude/claude code config guide 7 pn b7 #9.2 Implement reject_plan operation

Dependencies

• Blocked by: Odoo 15 adaptation #4, #006

Priority

P1