As a developer I want to fetch the data of a property, so I can use elements I need in my application
Further building up the `GET /entities/properties/{property_id}` route/endpoint, following the initial development in T337720.
Similar logic of handling `If-None-Match`, `If-Modified-Since`, as well as, `If-Match`, and `If-Unmodified-Since` as for the `GET /entities/items/{item_id}` route/endpoint,
Expected behaviour
* If-None-Match
* if the value includes the latest ETag: 304
* if the value does not include the latest ETag: 200
* if the value includes "*": 304
* If-Match
* if the value includes the latest ETag: 200
* if the value does not include the latest ETag: 412
* if the value includes "*": 200
* If-Modified-Since
* if value equals (or after) Last-Modified: 304
* if value is before Last-Modified: 200
* If-Modified-Since
* if value equals (or after) Last-Modified: 200
* if value is before Last-Modified: 412
If-Match, and If-Unmodified-Since are not the recommended/preferred headers but are handled for completeness.