Module schemas/ep/feed

Feed-endpoint Zod validation schemas.

All EP API v2 /…/feed endpoints share a common parameter pattern:

• timeframe — one of today | one-day | one-week | one-month | custom
• startDate — YYYY-MM-DD, required when timeframe is custom

Some feeds add a domain-specific type filter (workType, activityType, processType). Each schema below covers one feed endpoint.