fix: assorted hotfixes from demo review

[PThorpe92]

No description provided.

[calisio]

when i try to seed data i get this error

server-1            | 2024/12/13 21:33:46 /app/backend/src/database/seed_demo.go:14 record not found
server-1            | [6.344ms] [rows:0] SELECT * FROM "activities" WHERE external_id = 'SEEDED_ACTIVITY' AND "activities"."deleted_at" IS NULL ORDER BY created_at DESC,"activities"."id" LIMIT 1
server-1            | 2024/12/13 21:33:46 http: panic serving 192.168.144.7:43796: runtime error: integer divide by zero

The rest of the files look good though

[PThorpe92]

lol yup. i % IntN(30) i guess intN is 0 inclusive