chore(clade): backfill [status] lifecycle block (default active)

Adds the [status] block required by clade-hygiene CLADE-004/005 (gv-clade-index
ADR 0006). Default phase=active, since=2026-03-16; correct if the true phase differs.

Co-Authored-By: Claude Opus 4.8 <noreply@anthropic.com>

Author: hyperpolymath

.machine_readable/CLADE.a2ml

@@ -32,3 +32,24 @@ name = "CLADE"
 type = "standalone"
 parent = "Token/secret management vault"
 born = "2026-03-16"
+
+# Lifecycle status (added by clade-status-backfill; see gv-clade-index ADR 0006).
+# Identity (uuid) and status are SEPARATE layers: uuid is immortal; phase is a
+# mutable pointer. No phase is terminal (extinct -> active is a legal "Gitassic
+# Park" transition on the same uuid). A rename is NOT a phase change — the old
+# prefixed-name goes to aliases[], uuid and phase are untouched.
+[status]
+# One of: reserved incubating active dormant | merged superseded archived extinct
+phase = "active"
+since = "2026-03-16"
+present = true
+aliases = []
+merged-into = ""
+superseded-by = ""
+successors = []
+ended = ""
+
+[[status.history]]
+phase = "active"
+since = "2026-03-16"
+note = "backfilled default — correct if the true phase differs"