Adopt spec v0.2: schema, semantic validator, operating modes; workplans updated

Co-Authored-By: Claude Sonnet 5.5 <noreply@anthropic.com>

Assistant: claude-code
Assistant-Model: sonnet
Assistant-Process: 295952@bnt-lap001
Assistant-Session: e93f64ad-516c-46eb-9666-aad8d300c477

rtut/run.py

@@ -66,6 +66,8 @@ class Run:
 def create(pack: Pack, operator: str, params: dict[str, str] | None = None) -> Run:
     if not pack.ok or pack.data.get("engine") != "native":
         raise RunError("only valid native packs can be run")
+    if pack.spec != "runbook-pack/v0.1":
+        raise RunError(f"{pack.spec} packs cannot be run yet (RBT-WP-0007)")
     operator = _clean(operator.strip(), "operator")
     if not re.fullmatch(r"\S+", operator):
         raise RunError("operator must be one word (name or handle)")