fix(matrix,insights): louder unjoined-room error, outcome-only post log (#18)

## Fixed
- Matrix logs a clear actionable error when it cannot join the default room (names the bot user; "invite the bot user, then restart") instead of a soft warn that operators easily miss.
- Insight engine "post findings failed" line no longer re-spreads the notifier error; outcome only, since RetryNotifier already logged the cause.

Author: kgrubb

src/chat/adapters/matrix.ts

@@ -117,7 +117,10 @@ export async function startMatrixAdapter(opts: {
       await client.joinRoom(opts.defaultRoomId);
       log.info({ roomId: opts.defaultRoomId }, 'matrix joined default room');
     } catch (e) {
-      log.warn({ roomId: opts.defaultRoomId, err: e }, 'matrix failed to join default room');
+      log.error(
+        { roomId: opts.defaultRoomId, botUserId: client.getUserId() ?? undefined, err: e },
+        'matrix cannot join default room; invite the bot user, then restart',
+      );
     }
   }
 

src/insights/engine.ts

@@ -202,9 +202,9 @@ export async function startInsightEngine(opts: { config: KaytooConfig; insightSi
 
     try {
       await opts.insightSink.postInsight(text);
-    } catch (e) {
-      // Notifier already logged the cause; record outcome and skip dedupe so the next poll retries.
-      log.warn({ findingCount: novel.length, output: config.output, ...logErr(e) }, 'post findings failed');
+    } catch {
+      // Notifier already logged the cause; record outcome only and skip dedupe so the next poll retries.
+      log.warn({ findingCount: novel.length, output: config.output }, 'post findings failed');
       return;
     }
     for (const f of novel) dedupe.mark(f.id);