Collection Config Overwrites Revisions Setting if They're Turned Off

[alexclst]

Bug description

When you save a Collection configuration the default values currently get written out for any hidden fields. This means that if you have a site whose production instance has STATAMIC_REVISIONS_ENABLED set to true in .env, but since you're not Git-controlling the revisions (the default behavior), you've got that set to false on your local dev instance, then if you save the collection config from that local it will set revisions to false in the yaml. This seems wrong, because the fact that the setting is not showing (due to the .env variable) does not mean that the setting should be changed if present. This happens for all config options that have their fields currently hidden on the collection config screen, but is particularly dangerous for revisions. In such cases the revisions feature will disappear unexpectedly simply because the collection config was edited on an instance of a site where revisions was disabled in .env.

How to reproduce

1. Have a collection with revisions set to true in its yaml file on a site instance where STATAMIC_REVISIONS_ENABLED is set to true in .env.
2. Change STATAMIC_REVISIONS_ENABLED to false in .env, either in the same instance or a new clone
3. Go to the collection's config page and simply save it, you don't even need to change any visible settings
4. Notice that the revisions setting in the collection's yaml is now set to false

Logs

Environment

Environment
Laravel Version: 12.69.2
PHP Version: 8.3.32
Composer Version: 2.10.2
Environment: local
Debug Mode: ENABLED
Maintenance Mode: OFF
Timezone: UTC
Locale: en

Cache
Config: NOT CACHED
Events: NOT CACHED
Routes: NOT CACHED
Views: CACHED

Drivers
Broadcasting: log
Cache: file
Database: sqlite
Logs: stack / single
Mail: log
Queue: sync
Session: file

Storage
public/storage: NOT LINKED

Statamic
Addons: 7
License Key: Set
Sites: 1
Stache Watcher: Enabled (auto)
Static Caching: Disabled
Version: 6.31.0 PRO

Statamic Addons
el-schneider/statamic-simple-address: 2.2.2
iagofelicio/geo-maps: 2.4.0
jacksleight/statamic-bard-texstyle: 4.2.1
mitydigital/feedamic: 3.0.13
tenseg/barnacle: 0.2.1
tenseg/cascading-entry-protection: 0.1.1
transformstudios/events: 6.1.5

Installation

Fresh statamic/statamic site via CLI

Additional details

No response