This was found while working on #10957.
When running a live query, a lot of unused host data is stored in Redis
and sent on every live query result message via websockets. The frontend
and fleetctl just need `id`, `hostname` and `display_name`. (This
becomes worse every time we add new fields to the `Host` struct.)
Sample of one websocket message result when running `SELECT * from
osquery_info;`:
size in `main`: 2234 bytes
```
a["{\"type\":\"result\",\"data\":{\"distributed_query_execution_id\":57,\"host\":
{\"created_at\":\"2023-05-22T12:14:11Z\",\"updated_at\":\"2023-05-23T12:31:51Z\",
\"software_updated_at\":\"0001-01-01T00:00:00Z\",\"id\":106,\"detail_updated_at\":\"2023-05-23T11:50:04Z\",
\"label_updated_at\":\"2023-05-23T11:50:04Z\",\"policy_updated_at\":\"1970-01-02T00:00:00Z\",
\"last_enrolled_at\":\"2023-05-22T12:14:12Z\",
\"seen_time\":\"2023-05-23T09:52:23.876311-03:00\",\"refetch_requested\":false,
\"hostname\":\"lucass-macbook-pro.local\",\"uuid\":\"BD4DFA10-E334-41D9-8136-D2163A8FE588\",\"platform\":\"darwin\",\"osquery_version\":\"5.8.2\",\"os_version\":\"macOS 13.3.1\",\"build\":\"22E261\",\"platform_like\":\"darwin\",\"code_name\":\"\",
\"uptime\":91125000000000,\"memory\":34359738368,\"cpu_type\":\"x86_64h\",\"cpu_subtype\":\"Intel x86-64h Haswell\",\"cpu_brand\":\"Intel(R) Core(TM) i7-1068NG7 CPU @ 2.30GHz\",\"cpu_physical_cores\":4,\"cpu_logical_cores\":8,\"hardware_vendor\":\"Apple Inc.\",\"hardware_model\":\"MacBookPro16,2\",\"hardware_version\":\"1.0\",
\"hardware_serial\":\"0DPQR4HMD1FZ\",
\"computer_name\":\"Lucas’s MacBook Pro\",\"public_ip\":\"\",
\"primary_ip\":\"192.168.0.230\",\"primary_mac\":\"68:2f:67:8e:b6:1f\",
\"distributed_interval\":1,\"config_tls_refresh\":60,\"logger_tls_period\":10,\"team_id\":null,
\"pack_stats\":null,\"team_name\":null,
\"gigs_disk_space_available\":386.23,\"percent_disk_space_available\":40,
\"issues\":{\"total_issues_count\":0,\"failing_policies_count\":0},
\"mdm\":{\"enrollment_status\":null,\"server_url\":null,\"name\":\"\",\"encryption_key_available\":false},
\"status\":\"online\",\"display_text\":\"lucass-macbook-pro.local\",\"display_name\":\"Lucas’s MacBook Pro\"},
\"rows\":[{\"build_distro\":\"10.14\",\"build_platform\":\"darwin\",
\"config_hash\":\"b7ee9363a7c686e76e99ffb122e9c5241a791e69\",\"config_valid\":\"1\",
\"extensions\":\"active\",\"host_display_name\":\"Lucas’s MacBook Pro\",
\"host_hostname\":\"lucass-macbook-pro.local\",\"instance_id\":\"cde5de81-344b-4c76-b1c5-dae964fdd4f2\",\"pid\":\"8370\",\"platform_mask\":\"21\",\"start_time\":\"1684757652\",
\"uuid\":\"BD4DFA10-E334-41D9-8136-D2163A8FE588\",
\"version\":\"5.8.2\",\"watcher\":\"8364\"}],\"error\":null}}"]
```
vs. size of the message result on this branch: 675 bytes
```
a["{\"type\":\"result\",\"data\":{\"distributed_query_execution_id\":59,
\"host\":{\"id\":106,\"hostname\":\"lucass-macbook-pro.local\",
\"display_name\":\"Lucas’s MacBook Pro\"},
\"rows\":[{\"build_distro\":\"10.14\",\"build_platform\":\"darwin\",
\"config_hash\":\"f80dee827635db39077a458243379b3ad63311fd\",
\"config_valid\":\"1\",\"extensions\":\"active\",\"host_display_name\":\"Lucas’s MacBook Pro\",
\"host_hostname\":\"lucass-macbook-pro.local\",
\"instance_id\":\"cde5de81-344b-4c76-b1c5-dae964fdd4f2\",\"pid\":\"8370\",\"platform_mask\":\"21\",
\"start_time\":\"1684757652\",\"uuid\":\"BD4DFA10-E334-41D9-8136-D2163A8FE588\",\"version\":\"5.8.2\",
\"watcher\":\"8364\"}]}}"]
```
Manual tests included running with an old fleetctl running with a new
fleet server, and vice-versa, a new fleetctl running against an old
fleet server.
- [X] Changes file added for user-visible changes in `changes/` or
`orbit/changes/`.
See [Changes
files](https://fleetdm.com/docs/contributing/committing-changes#changes-files)
for more information.
- [X] Documented any API changes (docs/Using-Fleet/REST-API.md or
docs/Contributing/API-for-contributors.md)
- ~[ ] Documented any permissions changes~
- ~[ ] Input data is properly validated, `SELECT *` is avoided, SQL
injection is prevented (using placeholders for values in statements)~
- ~[ ] Added support on fleet's osquery simulator `cmd/osquery-perf` for
new osquery data ingestion features.~
- [X] Added/updated tests
- [X] Manual QA for all new/changed functionality
- ~For Orbit and Fleet Desktop changes:~
- ~[ ] Manual QA must be performed in the three main OSs, macOS, Windows
and Linux.~
- ~[ ] Auto-update manual QA, from released version of component to new
version (see [tools/tuf/test](../tools/tuf/test/README.md)).~
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