fix: can't join activity

[userMeh]

Summary 📝

#253

Which part of the repository is impacted ?

• API
• Client
• Admin
• Documentation
• CI/CD
• Other

Test plan 🧪

Screenshots (if appropriate): 📸

[github-actions]

Coverage Report for API (./apps/api)

Status	Category	Percentage	Covered / Total
🟢	Lines	88.2% (🎯 80%)	6755 / 7658
🟢	Statements	88.2% (🎯 80%)	6755 / 7658
🟢	Functions	79.16% (🎯 60%)	19 / 24
🟢	Branches	45.89% (🎯 35%)	263 / 573

File Coverage

File	Stmts	% Branch	% Funcs	% Lines	Uncovered Lines
Changed Files
apps/api/src/handlers/activities.ts	78.35%	21.81%	100%	78.35%	38-39, 49-50, 66-67, 73-74, 76-80, 82-90, 92-97, 99-102, 104-105, 112-113, 121-122, 125-126, 129-136, 159-162, 167-168, 187-188, 191-192, 221-222, 232-233, 236-237, 259-260, 308-309, 323-324, 387-388, 439-440, 454-455, 469-470, 488-491, 496-497

Generated in workflow #465