feat: use workspace identity for telemetry

src/langbot/pkg/workspace/identity.py

@@ -0,0 +1,20 @@
+from __future__ import annotations
+
+import uuid
+
+
+_INSTANCE_PREFIX = "instance_"
+_WORKSPACE_IDENTITY_NAMESPACE = uuid.UUID("8ea04f29-8528-4cc3-bb28-30a838c89d76")
+
+
+def workspace_uuid_from_instance_id(instance_id: str) -> str:
+    """Return the stable OSS Workspace UUID for a persisted instance identity."""
+    value = instance_id.strip()
+    if not value:
+        raise ValueError("LangBot instance identity is empty")
+
+    candidate = value[len(_INSTANCE_PREFIX) :] if value.startswith(_INSTANCE_PREFIX) else value
+    try:
+        return str(uuid.UUID(candidate))
+    except ValueError:
+        return str(uuid.uuid5(_WORKSPACE_IDENTITY_NAMESPACE, value))