fix: check if pgpro_stats was installed

Author: mstyushin

mamonsu/plugins/pgsql/statements.py

@@ -142,7 +142,7 @@ def run(self, zbx):
         # TODO: add 13 and 14 items when pgpro_stats added new WAL metrics
         all_items = self.Items.copy()
 
-        if Pooler.extension_version_greater("pgpro_stats", "1.8"):
+        if Pooler.extension_installed("pgpro_stats") and Pooler.extension_version_greater("pgpro_stats", "1.8"):
             info_view = 'pg_stat_statements_info'
             if self.extension == "pgpro_stats":
                 info_view = 'pgpro_stats_info'

mamonsu/tools/bootstrap/start.py

@@ -237,7 +237,7 @@ def run_deploy():
             if Pooler.is_pgpro() or Pooler.is_pgpro_ee():
                 bootstrap_extension_queries = fill_query_params(CreateWaitSamplingFunctionsSQL)
                 Pooler.query(bootstrap_extension_queries)
-                if Pooler.extension_version_greater("pgpro_stats", "1.8"):
+                if Pooler.extension_installed("pgpro_stats") and Pooler.extension_version_greater("pgpro_stats", "1.8"):
                     statements_items = [x[1] for x in Statements.Items_pgpro_stats_1_8] + [x[1] for x in Statements.Items_pg_13]
                     statements_columns = [x[0][x[0].find("[")+1:x[0].find("]")] for x in Statements.Items_pgpro_stats_1_8] + [x[0][x[0].find("[")+1:x[0].find("]")] for x in Statements.Items_pg_13]
                     bootstrap_extension_queries = CreateStatementsFunctionsSQL.format(