feat(parity): real --info=del deletion lines + rsync throttle pacing

- Wire: config frame gains report_deletes (protocol 2.26.0 -> 2.27.0); the
  receiver lists actually-removed paths in the STATUS_STATS path list, so the
  sender prints rsync's `deleting PATH` / `*deleting   PATH` lines for a real
  --delete run (and -i/out-format).  Observers threaded through the manifest,
  missing-args and per-directory delete engines; golden wire len/hash updated.
- bwlimit: throttle now paces like rsync 3.4.1 -- ~100ms burst capacity and the
  sleep is no longer credited as refill, so 4 MiB at 1024/2048 KiB/s matches
  rsync within ~4% (was ~2x too fast).

tests/test_config.c

@@ -2831,14 +2831,15 @@ static void golden_config_populate(Config* c) {
   c->copy_as_gid = 222;
 }
 
-/* The pinned golden frame (protocol 2.26.0).  The values below are the only
+/* The pinned golden frame (protocol 2.27.0).  The values below are the only
  * thing that ties the generated table to the historical wire format; update
  * them ONLY with a PROTOCOL_VERSION bump and a documented reason.  The 2.24.0
  * delete-plan wave changed only the version string; 2.25.0 appended the
- * report_stats bool and 2.26.0 appended the compression_algo int.  The
- * byte-exact values are recomputed for the merged layout. */
-#define GOLDEN_WIRE_LEN 705
-#define GOLDEN_WIRE_HASH 4673424031554175633ULL
+ * report_stats bool, 2.26.0 appended the compression_algo int, and 2.27.0
+ * appended the report_deletes bool.  The byte-exact values are recomputed for
+ * the merged layout. */
+#define GOLDEN_WIRE_LEN 709
+#define GOLDEN_WIRE_HASH 14423869696887880000ULL
 
 static unsigned long long fnv1a_64(const unsigned char* buf, size_t len) {
   unsigned long long h = 1469598103934665603ULL;