adding "facebookexternalhit" alongside "embedbot" fixes many errors, such as YouTube Music's:
"Your browser is deprecated. Please upgrade."
add admin command to clear URL stuck and broken data (per URL currently)
add command to clear all saved URL previews.
sync resolver docs.
**NOTE:** If there are any features, tools, or admin internals dependent on this output that would break, let me know!
I'm hoping this is acceptable, since it's a human-readable command.
Current output:
```shell
uwu> server list-backups
#1 Mon, 9 Feb 2026 20:36:25 +0000: 66135580 bytes, 595 files#2 Wed, 11 Feb 2026 02:33:15 +0000: 270963746 bytes, 1002 files#3 Sat, 14 Feb 2026 22:11:19 +0000: 675905487 bytes, 2139 files
```
Should be:
```shell
uwu> server list-backups
#1 Mon, 9 Feb 2026 20:36:25 +0000: 66135580 bytes, 595 files
#2 Wed, 11 Feb 2026 02:33:15 +0000: 270963746 bytes, 1002 files
#3 Sat, 14 Feb 2026 22:11:19 +0000: 675905487 bytes, 2139 files
```
- Issue a single-use token for initial account creation
- Disable registration through other methods until the first account is made
- Print helpful instructions to the console on the first run
- Improve the welcome message sent in the admin room on first run
Also fixes:
- Transaction IDs leaking in event route
- Age not being set for event relations or threads
- Both of the above for search results
Notes down concern with relations table
Paths given via --config at startup are now stored inside the config
struct at runtime, to make it possible to reload config without setting
an env var for the config file location.
- serde-yml has an un-addressed [security issue][sec-issue]
- [saphyr][saphyr] is a pretty recent and active crate that deals with YAML parsing
- based on that, someone recently created [serde-saphyr][serde-saphyr]
---
The change was pretty straightforward and mostly "just a search and replace". The new crate has it's `Error` type split
into serialization and derserialization errors. Hence I created one Continuwuity-Error variant for each instead of just
having a single `Yaml` variant. This was already done previously with the `Toml` errors so I thought this would be
rather acceptable.
[sec-issue]: https://github.com/advisories/GHSA-gfxp-f68g-8x78
[saphyr]: https://github.com/saphyr-rs/saphyr
[serde-saphyr]: https://github.com/saphyr-rs/saphyr/issues/66#issuecomment-3353212289
**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>
