Add SQLx operation tracing (#5223)

* wip: vendor sqlx-tracing

* (compiles) standardize pg types used

* more standardization

* general log message improvements

* wip: improve sqlx-tracing architecture

* unify sqlx::Executor type

* wip: try fix sqlx tracing

* wip: sqlx-tracing compiles

* so close

* it compiles

* fix ci

packages/sqlx-tracing/src/postgres.rs

@@ -0,0 +1,23 @@
+impl crate::Database for sqlx::Postgres {
+    const SYSTEM: &'static str = "postgresql";
+
+    type ConnectionRef<'a> = &'a mut sqlx::PgConnection;
+
+    fn cast_connection<'c>(
+        conn: &'c mut <Self as sqlx::Database>::Connection,
+    ) -> Self::ConnectionRef<'c> {
+        conn
+    }
+
+    // fn cast_pool_connection<'c>(
+    //     conn: &'c mut PoolConnection<Self>,
+    // ) -> Self::PoolConnection<'c> {
+    //     &mut conn.inner
+    // }
+
+    // fn cast_raw_connection<'c>(
+    //     conn: &'c mut <Self as sqlx::Database>::Connection,
+    // ) -> Self::RawConnection<'c> {
+    //     conn
+    // }
+}