v1.2.0: skip unchanged writes, transactional schema/root counters, snapshot replay for meta:events 0-0 (drops boot republish), collect-once search driver

internal/storage/stats.go

@@ -4,8 +4,9 @@ import (
 	"time"
 )
 
-// CountRoots returns the number of metadata roots in the root index — one
-// range count over idx:roots/, never the list itself.
+// CountRoots returns the number of metadata roots: a counter the write path
+// keeps exact (see onChange), so it costs one read — search reports it as
+// `total` on every query.
 func (c *Client) CountRoots() (int64, error) {
 	s, err := c.kv()
 	if err != nil {
@@ -13,7 +14,8 @@ func (c *Client) CountRoots() (int64, error) {
 	}
 	ctx, cancel := opCtx()
 	defer cancel()
-	return s.Count(ctx, rootsNS)
+	n, _, err := s.Counter(ctx, rootsCountKey)
+	return n, err
 }
 
 // keyCountTTL bounds how stale CountKeys may be. Counting every row is a full