Add logging on startup/shutdown (#8448)

This is so we can tell what is going on when things are taking a while to start up.

The main change here is to ensure that transactions that are created during startup get correctly logged like normal transactions.

synapse/storage/databases/main/schema/delta/31/pushers.py

@@ -65,16 +65,15 @@ def run_create(cur, database_engine, *args, **kwargs):
         row = list(row)
         row[12] = token_to_stream_ordering(row[12])
         cur.execute(
-            database_engine.convert_param_style(
-                """
-            INSERT into pushers2 (
-            id, user_name, access_token, profile_tag, kind,
-            app_id, app_display_name, device_display_name,
-            pushkey, ts, lang, data, last_stream_ordering, last_success,
-            failing_since
-            ) values (%s)"""
-                % (",".join(["?" for _ in range(len(row))]))
-            ),
+            """
+                INSERT into pushers2 (
+                id, user_name, access_token, profile_tag, kind,
+                app_id, app_display_name, device_display_name,
+                pushkey, ts, lang, data, last_stream_ordering, last_success,
+                failing_since
+                ) values (%s)
+            """
+            % (",".join(["?" for _ in range(len(row))])),
             row,
         )
         count += 1

synapse/storage/databases/main/schema/delta/31/search_update.py

@@ -55,8 +55,6 @@ def run_create(cur, database_engine, *args, **kwargs):
             " VALUES (?, ?)"
         )
 
-        sql = database_engine.convert_param_style(sql)
-
         cur.execute(sql, ("event_search_order", progress_json))