Record Stage 5 target custody preflight

.sot/03-PROTOCOLS/CTO-CASE-STAGE5-TARGET-REPOSITORY-ADMISSION.json

@@ -1,5 +1,6 @@
 {
   "admission_status": "admitted",
+  "admission_lifecycle": "historical-proof-target",
   "allowed_paths": [
     "strings.py",
     "test_strings.py",
@@ -36,11 +37,15 @@
     "vendor/",
     ".git/"
   ],
+  "future_execution_authorized": false,
+  "future_execution_requires_new_admission": true,
   "noncritical_rationale": "Dedicated owned Stage 5 sandbox repo, not production, no customer data, no secrets, no deploy path, no external users, safe to delete after validation.",
   "operator_outcome_required": true,
   "ownership_evidence": "JP chat approval on 2026-06-01 to create this dedicated Stage 5 target sandbox under /home/svrnty/workspaces/cortex-os.",
   "repository_owner": "jp",
   "review_trigger": "before Stage 5 execution against any different repository, before target repository path change, before allowed path change, before forbidden action change, before risk classification change",
   "risk_classification": "low_risk_noncritical",
+  "root_path_dependency": "historical-reference-only",
+  "custody_preflight_record": "docs/STAGE5-TARGET-SANDBOX-CUSTODY-PREFLIGHT.md",
   "target_repository_path": "/home/svrnty/workspaces/cortex-os/cto-stage5-target-sandbox"
 }