[B2] Daily entry read/list endpoints #7

Sprint B · Daily entry · area:api

Only POST / (record) exists. No way to read entries back.

Scope

• GET single daily entry by id (or by natural key: farm/house/flock/date).
• GET list daily entries for a flock over a date range (paged — PagedResult exists).

Done when: recorded entries are retrievable individually and as a paged list.

Migrated from Gitea issue #7 (https://gitea.mforcelabs.com/mforce/cluckwork/issues/7).