journal API: + asset_code a error_msg — diagnostika selhaných zápisů bez SSH

Co-Authored-By: Claude Opus 4.8 (1M context) <noreply@anthropic.com>

db/routines/R__027_fn_modbus_journal_list.sql

@@ -14,7 +14,9 @@ as $fn$
         'value_verified', q.value_verified,
         'status', q.status,
         'attempt_count', q.attempt_count,
-        'created_at', q.created_at
+        'created_at', q.created_at,
+        'asset_code', q.asset_code,
+        'error_msg', q.error_msg
       )
       order by q.created_at desc
     ),
@@ -30,7 +32,9 @@ as $fn$
       mc.value_verified,
       mc.status,
       mc.attempt_count,
-      mc.created_at
+      mc.created_at,
+      mc.asset_code,
+      mc.error_msg
     from ems.modbus_command mc
     where mc.site_id = p_site_id
     order by mc.created_at desc