chore: add logs on sadhna API

internal/repository/post_repo.go

@@ -254,7 +254,7 @@ func (r *PostRepo) PostCountsByDate(ctx context.Context, userID string, since ti
 		tz = "UTC"
 	}
 	rows, err := r.pg.Pool.Query(ctx, `
-		SELECT (created_at AT TIME ZONE $3)::date AS d, count(*) AS n
+		SELECT (created_at AT TIME ZONE $3::text)::date AS d, count(*) AS n
 		FROM posts
 		WHERE user_id = $1 AND created_at >= $2
 		GROUP BY d`,

internal/service/sadhna_service.go

@@ -148,11 +148,18 @@ func (s *SadhnaService) Dashboard(ctx context.Context, userID string) (*model.Sa
 
 	logs, err := s.logs.ListSince(ctx, userID, since)
 	if err != nil {
+		s.logger.Error("sadhna dashboard: list logs failed",
+			zap.String("user", userID), zap.Error(err))
 		return nil, err
 	}
+	// The quote half is non-critical: if it fails (e.g. an unrecognized
+	// timezone in the AT TIME ZONE bucketing), log it and degrade to "no
+	// quotes" rather than 500-ing the whole dashboard.
 	postsByDay, err := s.posts.PostCountsByDate(ctx, userID, since, tz)
 	if err != nil {
-		return nil, err
+		s.logger.Error("sadhna dashboard: post counts failed",
+			zap.String("user", userID), zap.String("tz", tz), zap.Error(err))
+		postsByDay = map[string]int{}
 	}
 
 	// Index the chanting half by day.
@@ -398,11 +405,15 @@ func (s *SadhnaService) History(ctx context.Context, userID string, from, to tim
 	tz, _ := s.resolveTZ(ctx, userID)
 	logs, err := s.logs.ListSince(ctx, userID, from)
 	if err != nil {
+		s.logger.Error("sadhna history: list logs failed",
+			zap.String("user", userID), zap.Error(err))
 		return nil, err
 	}
 	postsByDay, err := s.posts.PostCountsByDate(ctx, userID, from, tz)
 	if err != nil {
-		return nil, err
+		s.logger.Error("sadhna history: post counts failed",
+			zap.String("user", userID), zap.String("tz", tz), zap.Error(err))
+		postsByDay = map[string]int{}
 	}
 
 	chantByDay := make(map[string]bool, len(logs))