Create a diary entry

Logs a daily site-diary entry on behalf of a crew member. The key acts as a tenant Admin, so the body names the crew member (`userId`) the entry is for; the entry is attributed to them and they must be an active tenant member assigned to the project. `entryDate` may not be in the future, and `hours` are 0–14 in 0.25h steps. To attach photos, first upload each via `POST /projects/{id}/diary-photos/upload-url` and pass the returned `storagePath`(s) in `photoPaths`. Editing/deleting entries stays in the app.

curl -X POST "https://example.com/diary-entries" \  -H "Content-Type: application/json" \  -d '{    "projectId": "5a8591dd-4039-49df-9202-96385ba3eff8",    "userId": "2c4a230c-5085-4924-a3e1-25fb4fc5965b",    "entryDate": "2019-08-24",    "hours": 0  }'

{  "id": "497f6eca-6276-4993-bfeb-53cbbbba6f08",  "photoCount": 0}

{  "error": {    "code": "unauthorized",    "message": "Missing or invalid API key."  }}

{  "error": {    "code": "read_only",    "message": "Your subscription is inactive. This action is read-only."  }}

{  "error": {    "code": "not_found",    "message": "Not found."  }}

{  "error": {    "code": "validation",    "message": "One or more inputs are invalid.",    "fields": {      "fieldName": "A message explaining what's wrong with this field."    }  }}