Implement room v12 (#943)

**Does not yet work!** Currently, state resolution does not correctly resolve conflicting states. Everything else appears to work as expected, so stateres will be fixed soon, then we should be clear for takeoff.

Also: a lot of things currently accept a nullable room ID that really just don't need to. This will need tidying up before merge. Some authentication checks have also been disabled temporarily but nothing important.

A lot of things are tagged with `TODO(hydra)`, those need resolving before merge. External contributors should PR to the `hydra/public` branch, *not* ` main`.

---

This PR should be squash merged.

Reviewed-on: https://forgejo.ellis.link/continuwuation/continuwuity/pulls/943
Co-authored-by: nexy7574 <git@nexy7574.co.uk>
Co-committed-by: nexy7574 <git@nexy7574.co.uk>

src/service/migrations.rs

@@ -27,7 +27,7 @@ use crate::{Services, media};
 /// - If database is opened at lesser version we apply migrations up to this.
 ///   Note that named-feature migrations may also be performed when opening at
 ///   equal or lesser version. These are expected to be backward-compatible.
-pub(crate) const DATABASE_VERSION: u64 = 17;
+pub(crate) const DATABASE_VERSION: u64 = 18;
 
 pub(crate) async fn migrations(services: &Services) -> Result<()> {
 	let users_count = services.users.count().await;
@@ -138,6 +138,11 @@ async fn migrate(services: &Services) -> Result<()> {
 		info!("Migration: Bumped database version to 17");
 	}
 
+	if services.globals.db.database_version().await < 18 {
+		services.globals.db.bump_database_version(18);
+		info!("Migration: Bumped database version to 18");
+	}
+
 	assert_eq!(
 		services.globals.db.database_version().await,
 		DATABASE_VERSION,