debug: add logging to reaction handler for approval flow diagnosis

Co-Authored-By: Claude Opus 4.6 (1M context) <noreply@anthropic.com>

bot.py

@@ -1475,6 +1475,8 @@ class Bot:
         event_id = event.reacts_to
         reaction_key = event.key
 
+        logger.info("Reaction received: key=%s reacts_to=%s sender=%s", reaction_key, event_id, event.sender)
+
         # Check if this reaction is for a pipeline approval
         if not self.cron_scheduler:
             return
@@ -1482,8 +1484,14 @@ class Bot:
         from pipelines.approval import reaction_to_response
         response = reaction_to_response(reaction_key)
         if not response:
+            logger.debug("Reaction key %s not an approval response", reaction_key)
             return
 
+        logger.info("Approval reaction: %s -> %s (tracked events: %s, active futures: %s)",
+                     event_id, response,
+                     list(self._pipeline_approval_events.keys()),
+                     list(self.cron_scheduler.pipeline_engine._approval_futures.keys()))
+
         # Look up execution by approval event ID
         execution_id = self._pipeline_approval_events.get(event_id)
         if execution_id:
@@ -1492,10 +1500,13 @@ class Bot:
                 self._pipeline_approval_events.pop(event_id, None)
                 logger.info("Pipeline approval resolved: %s -> %s", execution_id, response)
                 return
+            else:
+                logger.warning("Failed to resolve approval %s (future not found or already done)", execution_id)
 
         # If not in local cache, check pending approvals from portal
         try:
             pending = await self.cron_scheduler._pipeline_state.fetch_pending_approvals()
+            logger.info("Checking %d pending approvals from portal for event %s", len(pending), event_id)
             for execution in pending:
                 if execution.get("approvalMsgId") == event_id:
                     eid = execution["id"]
@@ -1504,6 +1515,8 @@ class Bot:
                     if resolved:
                         self._pipeline_approval_events.pop(event_id, None)
                         logger.info("Pipeline approval resolved (from portal): %s -> %s", eid, response)
+                    else:
+                        logger.warning("Portal found execution %s but future not active", eid)
                     break
         except Exception:
             logger.debug("Failed to check pending approvals for reaction", exc_info=True)