Make sure (most) queries avoid table scans.

I've exempted inserts (they never scan in the first place), queries on `event_sequence` (at most one row), and the coalesce()s used for event replay (for now; these are obviously a performance risk area and need addressing).

Method:

```
find .sqlx -name 'query-*.json' -exec jq -r '"explain query plan " + .query + ";"' {} + > explain.sql
```

Then go query by query through the resulting file.

1 files changed, 1 insertions, 1 deletions

diff --git a/src/boot/app.rs b/src/boot/app.rs
index 1d88608..e716b58 100644
--- a/src/boot/app.rs
+++ b/src/boot/app.rs
@@ -23,7 +23,7 @@ impl<'a> Boot<'a> {
         let resume_point = tx.sequence().current().await?;
 
         let logins = tx.logins().all(resume_point.into()).await?;
-        let channels = tx.channels().all(resume_point.into()).await?;
+        let channels = tx.channels().all(resume_point).await?;
         let messages = tx.messages().all(resume_point.into()).await?;
 
         tx.commit().await?;