get rid of uneccessary expects/unwraps in open_upend; logging

src/database.rs

@@ -713,16 +713,19 @@ pub fn open_upend<P: AsRef<Path>>(dirpath: P, reinitialize: bool) -> Result<Open
             enable_foreign_keys: true,
             busy_timeout: Some(Duration::from_secs(30)),
         }))
-        .build(manager)
-        .expect("Failed to create pool.");
+        .build(manager)?;
+
+    trace!("Pool created, running migrations...");
 
     embedded_migrations::run_with_output(
-        &pool.get().unwrap(),
+        &pool.get()?,
         &mut LoggerSink {
             ..Default::default()
         },
     )?;
 
+    trace!("Initializing types...");
+
     initialize_types(&pool)?;
 
     Ok(OpenResult { pool, new })